Stub workflow to regen keycode files

.github/workflows/regen.yml

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+name: PR Regenerate Files
+
+permissions:
+  contents: read
+
+on:
+  pull_request:
+    paths:
+    - 'data/constants/**'
+    - 'lib/python/**'
+
+jobs:
+  regen:
+    runs-on: ubuntu-latest
+
+    container: qmkfm/qmk_cli
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Run qmk generators
+      run: |
+        util/regen.sh
+        git diff
+
+    - name: Fail when regeneration required
+      run: |
+        git diff
+        for file in $(git diff --name-only); do
+          echo "File '${file}' Requires Regeneration"
+          echo "::error file=${file}::Requires Regeneration"
+        done
+        test -z "$(git diff --name-only)"

.github/workflows/regen_push.yml

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+name: Regenerate Files
+
+permissions:
+  contents: write
+
+on:
+  push:
+    branches:
+    - master
+    - develop
+
+jobs:
+  regen:
+    runs-on: ubuntu-latest
+
+    container: qmkfm/qmk_cli
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Run qmk generators
+      run: |
+        util/regen.sh
+        git diff
+
+    - uses: rlespinasse/[email protected]
+
+    - name: Become QMK Bot
+      run: |
+        git config user.name 'QMK Bot'
+        git config user.email '[email protected]'
+
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@v4
+      if: ${{ github.repository == 'qmk/qmk_firmware'}}
+      with:
+        token: ${{ secrets.QMK_BOT_TOKEN }}
+        delete-branch: true
+        branch: bugfix/format_${{ env.GITHUB_REF_SLUG }}
+        author: QMK Bot <[email protected]>
+        committer: QMK Bot <[email protected]>
+        commit-message: Regenerate Files
+        title: '[CI] Regenerate Files'

util/regen.sh

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+#!/bin/bash
+set -e
+
+qmk generate-rgb-breathe-table -o quantum/rgblight/rgblight_breathe_table.h
+qmk generate-keycodes --version latest -o quantum/keycodes.h
+
+for lang in $(find data/constants/keycodes/extras/ -type f -printf "%f\n"  | sed "s/keycodes_\(.*\)_[0-9].*/\1/"); do
+  qmk generate-keycode-extras --version latest --lang $lang -o quantum/keymap_extras/keymap_$lang.h
+done