chore: auto-update submodule and tests and create a PR

.github/workflows/update_submodule_and_tests.yml

@@ -0,0 +1,48 @@
+name: Update Submodule and Run Tests
+
+on:
+  schedule:
+    - cron: '0 11 * * 4'  # Runs weekly on Thursday at 11 am
+
+env:
+  PY_COLORS: 1
+  PYTEST_ADDOPTS: "--numprocesses=logical"
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  pytest:
+    strategy:
+      matrix:
+        python-version: ["3.12"]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+        with:
+          enable-cache: "true"
+          cache-suffix: pytest-${{ matrix.python-version }}
+          cache-dependency-glob: "pyproject.toml"
+      - name: install-reqs
+        run: |
+            git submodule update --init --recursive
+            uv pip install -e narwhals --system
+            uv pip install -e . --group tests --system
+      - name: run-submodule-update
+        run: . utils/submodule_update.sh
+      - name: update-tests
+        run: python update_run_tests.py
+      - name: create-pull-request
+        uses: peter-evans/create-pull-request@v8
+        with:
+          commit-message: 'chore: auto-update tests and submodule'
+          title: 'chore: auto-update tests and submodule'
+          branch: chore/test-and-submodule-auto-updates
+          delete-branch: true

CONTRIBUTING.md

@@ -30,6 +30,11 @@ and also fetch and install Narwhals as a git submodule:
 git submodule update --init --recursive
 uv pip install -e narwhals
 ```
+Keep daft to the latest version:
+
+```console
+uv pip install daft -U
+```
 
 To run the tests: