Add CI workflow file

.gitea/workflows/ci.yml

@@ -1 +1,52 @@
-checking
+name: CI
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.9', '3.10', '3.11']
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e .[dev]
+      - name: Lint with flake8
+        run: |
+          pip install flake8
+          flake8 src/ tests/ --max-line-length=100 --ignore=E501,W503
+      - name: Run tests
+        run: |
+          pip install pytest pytest-cov
+          pytest tests/ -v --tb=short
+
+  build:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install build
+          python -m build
+      - name: Verify build
+        run: |
+          pip install dist/*.whl
+          pip install requests ghapi
+          python -c "import code_pattern_search_cli; print('Build successful')"