fix: resolve CI workflow failures

- Remove tree-sitter CLI installation (npm not needed)
- Remove tree-sitter parsers installation
- Simplified dependency installation to pytest/pytest-cov
- Fixed package installation to use 'pip install -e vibeguard/'
- Create proper pyproject.toml with all dependencies

.gitea/workflows/ci.yml

@@ -11,16 +11,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+
       - uses: actions/setup-python@v5
         with:
           python-version: '3.11'
+
       - name: Install dependencies
         run: |
-          pip install --upgrade pip
           pip install pytest pytest-cov
-      - name: Install VibeGuard
-        run: |
           pip install -e vibeguard/
+
       - name: Run tests
+        run: pytest vibeguard/tests/ -v --tb=short
+
+      - name: Run linting
         run: |
-          pytest tests/unit/test_patterns.py tests/unit/test_analyzers.py tests/integration/test_cli.py tests/integration/test_reports.py -v --cov=vibeguard
+          pip install ruff
+          ruff check vibeguard/