Fix CI workflow - add checkout, Python setup, deps, and tests

.gitea/workflows/ci.yml

@@ -5,13 +5,18 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Check Python
-        run: |
-          python3 --version
-          which python3
+      - name: Checkout code
+        uses: actions/checkout@v4
 
-      - name: List files
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
         run: |
-          ls -la
-          echo "---"
-          ls -d */
+          pip install -e .
+          pip install pytest pytest-cov
+
+      - name: Run tests
+        run: pytest tests/ -v --cov=man_card --cov-report=term-missing