Initial upload with CI/CD workflow

.gitea/workflows/lint.yml

@@ -0,0 +1,26 @@
+name: Lint
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install lint tools
+        run: |
+          pip install ruff mypy
+      - name: Run ruff
+        run: |
+          ruff check .
+      - name: Run mypy
+        run: |
+          mypy shellgen/ --ignore-missing-imports