chore(clients): add workflow to auto-close PR (generated)

algolia/api-clients-automation#3834

Co-authored-by: algolia-bot <accounts+algolia-api-client-bot@algolia.com>
Co-authored-by: Clément Vannicatte <vannicattec@gmail.com>

Author: algolia-bot

.github/workflows/do-not-edit-this-repository.yml

@@ -0,0 +1,24 @@
+name: Do not edit files in this repository
+
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopen
+    branches:
+      - 'main'
+
+jobs:
+  auto_close_pr:
+    name: Close PR
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Close PR
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+        run: |
+          gh pr close "${PR_NUMBER}" -d -c "Thanks for contributing to our API clients! Sorry to close your PR, but this repository is fully generated, you can port your changes to [the API Clients Automation repository](https://github.com/algolia/api-clients-automation). If you need some guidance, feel free to [open an issue](https://github.com/algolia/api-clients-automation/issues) or [read our contribution guide](https://api-clients-automation.netlify.app/docs/introduction)."