Add Gitea action to check ruff linting/formatting

.gitea/workflows/ruff.yml

@@ -0,0 +1,12 @@
+name: Ruff
+on: [ push, pull_request ]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: chartboost/ruff-action@v1
+      - uses: chartboost/ruff-action@v1
+        with:
+          args: format --check --diff