Fix CI workflow - add missing actions/checkout step

.gitea/workflows/ci.yml

@@ -1,9 +1,30 @@
 name: CI
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - run: pip install pytest && pip install -r requirements.txt && pytest tests/ -v
+      - uses: actions/checkout@v4
+      
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+      
+      - name: Run tests
+        run: pytest tests/ -v --cov=man_card --cov-report=term-missing
+      
+      - name: Check code quality
+        run: |
+          pip install ruff
+          ruff check man_card/ tests/