Added Gitea Actions workflow for linting source code.

.gitea/workflows/lint.yml

@@ -0,0 +1,19 @@
+name: Lint Source Code
+on: [push]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Python environment
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.13
+
+      - name: Run linter
+        uses: psf/black@stable