ci: add lint workflow

.github/workflows/lint.yaml

@@ -0,0 +1,31 @@
+name: Lint
+on: [push, pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - 3.12
+        job:
+          - mypy .
+          - ruff format --check .
+          - ruff check .
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
+
+      - name: Install dependencies
+        run: uv sync --all-extras --all-groups
+
+      - run: uv run ${{ matrix.job }}