run pytest in pipeline with uv

.forgejo/workflows/tests.yaml

@@ -0,0 +1,23 @@
+name: Tests
+
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: https://github.com/astral-sh/setup-uv@v5
+
+      - name: Run tests
+        run: uv run --env-file=.env.example pytest