add CI workflow

.gitea/workflows/ci.yaml

@@ -0,0 +1,11 @@
+name: CI
+on: [push]
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
+      - name: Lint
+        run: uv run python -m py_compile main.py config.py gitea.py workspace.py