Update linting workflows for frontend and Python code (#2171)

* chore: Update pre-commit hooks and dependencies

* chore: Add linting workflow for frontend code

* chore: Update linting workflow for Python code and include tests in pull requests

* chore: Add Ruff style check workflow for Python code

.github/workflows/lint-py.yml

@@ -0,0 +1,51 @@
+name: Lint Python
+
+on:
+  pull_request:
+    paths:
+      - "poetry.lock"
+      - "pyproject.toml"
+      - "src/backend/**"
+      - "tests/**"
+
+env:
+  POETRY_VERSION: "1.8.2"
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.12"
+          - "3.11"
+          - "3.10"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }} + Poetry ${{ env.POETRY_VERSION }}
+        uses: "./.github/actions/poetry_caching"
+        with:
+          python-version: ${{ matrix.python-version }}
+          poetry-version: ${{ env.POETRY_VERSION }}
+          cache-key: ${{ runner.os }}-poetry-${{ env.POETRY_VERSION }}-${{ hashFiles('**/poetry.lock') }}
+      - name: Install Python dependencies
+        run: |
+          poetry env use ${{ matrix.python-version }}
+          poetry install
+      - name: Get .mypy_cache to speed up mypy
+        uses: actions/cache@v4
+        env:
+          SEGMENT_DOWNLOAD_TIMEOUT_MIN: "2"
+        with:
+          path: |
+            ./.mypy_cache
+          key: ${{ runner.os }}-mypy-${{ hashFiles('**/pyproject.toml') }}
+      - name: Run linters
+        uses: wearerequired/lint-action@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          # Enable linters
+          git_email: "gabriel@langflow.org"
+          mypy: true
+          mypy_args: '--namespace-packages -p "langflow"'
+