feat: Add Backend CI workflow for linting and setup

.gitea/workflows/test.yml

@@ -0,0 +1,31 @@
+name: Backend CI
+
+on:
+  push:
+    branches: 
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: "Set up python"
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: "pyproject.toml"
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
+
+      - name: Install requirements
+        run: uv sync --locked --all-extras --dev
+
+      - name: Run linter
+        run: uv run ruff check