Refactor CI workflow to use Poetry and Python 3.8

Author: MrMaydo

.github/workflows/python-package-conda.yml

@@ -0,0 +1,41 @@
+name: Python tests
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.8"
+
+      - name: Install Poetry
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+
+      - name: Install dependencies
+        run: |
+          poetry install --with dev
+
+      - name: Run pytest
+        run: |
+          poetry run pytest
+
+      - name: Upload pytest HTML report
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: pytest-report
+          path: reports/report.html
+