ci: add GitHub Actions workflow for linting and unit tests

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI Pipeline
+
+on:
+  push:
+    branches: [ "main", "dev", "fix/*", "feat/*", "docs/*" ]
+  pull_request:
+    branches: [ "main", "dev" ]
+
+jobs:
+  lint-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: "pip"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install ruff mypy pytest pytest-asyncio
+          pip install .
+
+      - name: Run Ruff (linter)
+        run: |
+          ruff check src/ tests/
+
+      - name: Run Mypy (type check)
+        run: |
+          mypy src/ --strict
+
+      - name: Run Pytest (unit tests)
+        run: |
+          pytest tests/unit/ -v