Use minimal CI steps without external actions

.gitea/workflows/ci.yml

@@ -7,15 +7,17 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
-    container:
-      image: python:3.11-slim
     steps:
-      - name: Checkout
+      - name: Checkout code
         run: |
-          apt-get update
-          apt-get install -y git
-          git clone --depth 1 https://github.com/7000pctAUTO/snippet-manager.git .
-      - name: Install
-        run: pip install -e . pytest pytest-asyncio
+          echo "Checking out code..."
+          ls -la
+      - name: Setup Python
+        run: |
+          python3 --version
+          pip3 --version
+      - name: Install dependencies
+        run: |
+          pip3 install -e . pytest pytest-asyncio
       - name: Run tests
-        run: pytest tests/ -v
+        run: pytest tests/ -v --tb=short