CI: Update CARS.md every night (#1590)

* Initial commit

* move to top

* for testing -  will revert

* try this to get test to get actions to show

* revert order

* rename worflow

* for testing - will revert

* revert name change

* editable mode

* build cython modules

* be explicit

* simplify pip install

* add submodules

* revert to working code

* TEST edit

* docs: Nightly update CARS.md

* clearer auto commit message

* revert test doc change

* docs: Scheduled auto-update CARS.md

* rm on pull request

* simpler approach

* testing again

* install scons

* revert to working code

* testing last time

* docs: Scheduled auto-update CARS.md

* revert test changes

* auto generate CARS to revert md changes from test

* docs: Scheduled auto-update CARS.md

* revert on pull request

* change to 12am PST

* rm blank line

* add name

* Update .github/workflows/update-cars-docs.yml

---------

Co-authored-by: ugtthis <ugtthis@users.noreply.github.com>
Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

.github/workflows/update-cars-docs.yml

@@ -0,0 +1,25 @@
+name: Update CARS.md
+
+on:
+  schedule:
+    - cron: '0 8 * * *'  # 12am PST (8am UTC)
+  workflow_dispatch:
+
+jobs:
+  update-cars:
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Generate Car Docs
+        run: |
+          pip install -e .
+          scons -c && scons -j$(nproc)
+          python -m pip install jinja2==3.1.4 natsort==8.4.0
+          python opendbc/car/docs.py
+      - uses: stefanzweifel/git-auto-commit-action@8621497c8c39c72f3e2a999a26b4ca1b5058a842
+        with:
+          commit_message: 'docs: Scheduled auto-update CARS.md'
+          file_pattern: 'docs/CARS.md'
+