automating maintenance with Github actions

.github/workflows/maintenance.yaml

@@ -0,0 +1,34 @@
+on:
+  push:
+    branches: [ master ]
+  schedule:
+    - cron: '*/5 * * * *'
+  workflow_dispatch: # Enables on-demand/manual triggering
+jobs:
+  job:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.18
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.6
+      - run: |
+          git submodule update --remote
+          cd tools/magic-modules/mmv1
+          bundle install
+          bundle exec compiler -a --force tflint -v ga -e terraform -o ../../../rules/magicmodules
+          gofmt -s -w ../../../rules/magicmodules/*.go
+      - uses: peter-evans/create-pull-request@v4
+        with:
+          commit-message: |
+            autogenerated maintenance
+          title: autogenerated maintenance
+          delete-branch: true
+          body: |
+            If tests are stuck on https://github.com/peter-evans/create-pull-request/issues/48:
+            ["Manually close pull requests and immediately reopen them. This will enable `on: pull_request` workflows to run and be added as checks."](https://github.com/peter-evans/create-pull-request/blob/master/docs/concepts-guidelines.md#triggering-further-workflow-runs)