run lint & format, add ci pipeline

Author: fed1337

.github/workflows/ci.yml

@@ -23,8 +23,8 @@ jobs:
       - name: Sync dev dependencies
         run: uv sync --frozen --dev
       - name: Ruff check
-        run: uv run ruff check .
+        run: uv run ruff check lemur
       - name: Ruff format check
-        run: uv run ruff format --check .
+        run: uv run ruff format --check lemur
       - name: mypy check
         run: uv run mypy lemur