CI: weekly poetry lock (#29738)

* CI: weekly poetry lock

* add that back

* title

* cleanup

.github/workflows/repo-maintenance.yaml

@@ -0,0 +1,32 @@
+name: repo maintenance
+
+on:
+  schedule:
+    - cron: "0 15 * * 2"
+  workflow_dispatch:
+
+jobs:
+  updates:
+    name: updates
+    runs-on: ubuntu-20.04
+    container:
+      image: ghcr.io/commaai/openpilot-base:latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: poetry lock
+      run: |
+        pip install poetry
+        poetry lock
+    - name: pre-commit autoupdate
+      run: |
+        git config --global --add safe.directory '*'
+        pre-commit autoupdate
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@5b4a9f6a9e2af26e5f02351490b90d01eb8ec1e5
+      with:
+        token: ${{ secrets.ACTIONS_CREATE_PR_PAT }}
+        commit-message: Update Python packages and pre-commit hooks
+        title: 'Update Python packages and pre-commit hooks'
+        branch: auto-package-updates
+        base: master
+        delete-branch: true