Ajout d'un workflow Gitea

pour le linting et le formatage du code sur la branche de `dev` uniquement.

See: [#196](https://forge.chapril.org/jmtrivial/agenda_culturel/issues/196)

.gitea/workflows/lint-format.yml

@@ -0,0 +1,43 @@
+name: Lint and Format
+
+on:
+  push:
+    branches:
+      - dev
+  pull_request:
+    branches:
+      - dev
+
+env:
+  SRC_DIRS: "src experimentations"
+
+jobs:
+  lint-format:
+    name: Run Linter and Formatter
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Run Ruff Fix
+        uses: chartboost/ruff-action@v1
+        with:
+          src: ${{ env.SRC_DIRS }}
+          args: --fix
+
+      - name: Run Ruff Check
+        uses: chartboost/ruff-action@v1
+        with:
+          src: ${{ env.SRC_DIRS }}
+
+      - name: Run Black Formatting
+        uses: psf/black@stable
+        with:
+          src: ${{ env.SRC_DIRS }}
+
+      - name: Run Black Check
+        uses: psf/black@stable
+        with:
+          src: ${{ env.SRC_DIRS }}
+          options: --check