chore: Add CI/CD.

Author: Luke Sneeringer

.github/CODEOWNERS

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+# The AIP working group owns the content of this repository.
+*   @aip-dev/aip

.github/workflows/publish.yaml

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+---
+name: publish
+on:
+  push:
+    branches:
+      - master
+jobs:
+  github-pages:
+    runs-on: ubuntu-latest
+    container: python:3.8
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install system dependencies.
+        run: apt-get update && apt-get install -y rsync
+      - name: Install the site generator.
+        run: pip install -r requirements.txt
+      - name: Build the static site.
+        run: aip-site-gen . out
+      - name: Publish the static site to GitHub Pages.
+        uses: jamesives/github-pages-deploy-action@releases/v3
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          BRANCH: gh-pages
+          FOLDER: out

.github/workflows/test.yaml

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+---
+name: test
+on:
+  pull_request:
+    branches:
+      - master
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: python:3.8
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install the site-generator
+        run: pip install -r requirements.txt
+      - name: Build the site.
+        run: aip-site-gen . /out