chore: Add release-please configuration and workflow files

.github/prerelease-config.json

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+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "always-update": true,
+  "changelog-type": "default",
+  "commit-search-depth": 50,
+  "draft": true,
+  "force-tag-creation": true,
+  "include-commit-authors": true,
+  "include-component-in-tag": false,
+  "include-v-in-release-name": true,
+  "include-v-in-tag": true,
+  "initial-version": "2.9.0",
+  "prerelease": true,
+  "prerelease-type": "rc.1",
+  "release-type": "node",
+  "versioning": "prerelease",
+  "packages": {
+    ".": {
+      "changelog-sections": [
+        { "type": "feat", "section": ":sparkles: Features" },
+        { "type": "feature", "section": ":sparkles: Features" },
+        { "type": "fix", "section": ":bug: Bug Fixes" },
+        { "type": "patch", "section": ":bug: Bug Fixes" },
+        { "type": "perf", "section": ":zap: Performance Improvements" },
+        { "type": "refactor", "section": ":wrench: Code Refactoring" },
+        { "type": "docs", "section": ":books: Documentation" },
+        { "type": "style", "section": ":art: Styles" },
+        { "type": "test", "section": ":test_tube: Tests" },
+        { "type": "build", "section": ":building_construction: Build System and dependencies" },
+        { "type": "ci", "section": ":building_construction: Build System and dependencies" },
+        { "type": "chore", "section": ":broom: Chores", "hidden": false },
+        { "type": "revert", "section": ":rewind: Reverts" }
+      ]
+    }
+  }
+}

.github/prerelease-manifest.json

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+{ }

.github/release-config.json

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+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "always-update": true,
+  "changelog-type": "default",
+  "commit-search-depth": 50,
+  "draft": true,
+  "force-tag-creation": true,
+  "include-commit-authors": true,
+  "include-component-in-tag": false,
+  "include-v-in-release-name": true,
+  "include-v-in-tag": true,
+  "initial-version": "2.9.0",
+  "prerelease": false,
+  "prerelease-type": "rc.1",
+  "release-type": "node",
+  "versioning": "default",
+  "packages": {
+    ".": {
+      "changelog-sections": [
+        { "type": "feat", "section": ":sparkles: Features" },
+        { "type": "feature", "section": ":sparkles: Features" },
+        { "type": "fix", "section": ":bug: Bug Fixes" },
+        { "type": "patch", "section": ":bug: Bug Fixes" },
+        { "type": "perf", "section": ":zap: Performance Improvements" },
+        { "type": "refactor", "section": ":wrench: Code Refactoring" },
+        { "type": "docs", "section": ":books: Documentation" },
+        { "type": "style", "section": ":art: Styles" },
+        { "type": "test", "section": ":test_tube: Tests" },
+        { "type": "build", "section": ":building_construction: Build System and dependencies" },
+        { "type": "ci", "section": ":building_construction: Build System and dependencies" },
+        { "type": "chore", "section": ":broom: Chores", "hidden": false },
+        { "type": "revert", "section": ":rewind: Reverts" }
+      ],
+      "extra-files": [
+        {
+          "type": "json",
+          "path": ".github/prerelease-manifest.json",
+          "jsonpath": "$[\".\"]"
+        }
+      ]
+    }
+  }
+}

.github/release-manifest.json

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+{ }

.github/workflows/release-please.yml

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+name: Create release
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+    inputs:
+      prerelease:
+        description: Create a prerelease instead of a release
+        type: boolean
+        required: false
+        default: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created || steps.prerelease.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name || steps.prerelease.outputs.tag_name }}
+      is_prerelease: ${{ steps.detect-prerelease.outputs.is_prerelease }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+
+      - name: Detect prerelease from version in package.json
+        id: detect-prerelease
+        run: |
+          VERSION=$(sed -nE 's/^[[:space:]]*"version"[[:space:]]*:[[:space:]]*"([^"]+)".*/\1/p' package.json | head -n 1)
+          IS_PRERELEASE=false
+          if [[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$ ]]; then
+            IS_PRERELEASE=true
+          fi
+          echo "is_prerelease=${IS_PRERELEASE}" >> "$GITHUB_OUTPUT"
+
+      - name: Create prerelease
+        if: (github.event_name == 'workflow_dispatch' && inputs.prerelease == true) || steps.detect-prerelease.outputs.is_prerelease == 'true'
+        uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
+        id: prerelease
+        with:
+          config-file: .github/prerelease-config.json
+          manifest-file: .github/prerelease-manifest.json
+
+      - name: Create release
+        if: (github.event_name == 'workflow_dispatch' && inputs.prerelease == false) || steps.detect-prerelease.outputs.is_prerelease == 'false'
+        uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
+        id: release
+        with:
+          config-file: .github/release-config.json
+          manifest-file: .github/release-manifest.json
+
+  upload-asset:
+    needs: release
+    if: ${{ needs.release.outputs.release_created }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      id-token: write
+      attestations: write
+
+    env:
+      TAG_NAME: ${{ needs.release.outputs.tag_name }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: 24.x
+          cache: 'npm'
+
+      - run: npm ci
+
+      - run: npm run build-artifact
+
+      - name: Create zip file
+        run: pushd packages/pxweb2/dist && zip -r $OLDPWD/pxweb-${{ env.TAG_NAME }}.zip ./
+
+      - name: Upload release asset
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release upload ${{ env.TAG_NAME }} pxweb-${{ env.TAG_NAME }}.zip
+
+  docker-publish:
+    needs: release
+    if: ${{ needs.release.outputs.release_created }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      REGISTRY: ghcr.io
+      IMAGE_NAME: ${{ github.repository }}
+      TAG_NAME: ${{ needs.release.outputs.tag_name }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@06116385d9baf250c9f4dcb4858b16962ea869c3 # v4.1.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern={{version}},value=${{ env.TAG_NAME }}
+            type=semver,pattern={{major}}.{{minor}},value=${{ env.TAG_NAME }}
+            type=semver,pattern={{major}},value=${{ env.TAG_NAME }}
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  publish-release:
+    needs: [release, upload-asset, docker-publish]
+    if: ${{ needs.release.outputs.release_created }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    env:
+      TAG_NAME: ${{ needs.release.outputs.tag_name }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+
+      - name: Publish release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release edit ${{ env.TAG_NAME }} --draft=false