ci: add one-shot phpcbf workflow (will be removed after Wave 1 lands)

.github/workflows/phpcbf-oneshot.yml

@@ -0,0 +1,63 @@
+name: phpcbf-oneshot
+
+# One-shot workflow: runs phpcbf against the current branch and commits the
+# auto-fixes back. Triggered manually via workflow_dispatch. Intended to be
+# deleted in a follow-up commit once the fix-up has landed.
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  phpcbf:
+    name: phpcbf autofix + commit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.ref }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          persist-credentials: true
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.1'
+          coverage: none
+          tools: composer:v2, phpcbf, phpcs
+      - name: Install WordPress Coding Standards
+        run: |
+          composer global config --no-plugins allow-plugins.dealerdirect/phpcodesniffer-composer-installer true
+          composer global require --no-interaction \
+            "dealerdirect/phpcodesniffer-composer-installer:^1.0" \
+            "wp-coding-standards/wpcs:^3.0" \
+            "phpcsstandards/phpcsutils:^1.0" \
+            "phpcsstandards/phpcsextra:^1.0"
+      - name: Run phpcbf
+        run: |
+          # phpcbf exits 1 when fixes applied, 2 when unfixable, 0 when clean.
+          # Do not let a non-zero exit abort the workflow.
+          phpcbf --standard=phpcs.xml \
+            --extensions=php \
+            --ignore=vendor/*,tests/*,node_modules/* \
+            includes/ prautoblogger.php uninstall.php || true
+      - name: Verify phpcs clean after autofix
+        run: |
+          phpcs --standard=phpcs.xml \
+            --extensions=php \
+            --ignore=vendor/*,tests/*,node_modules/* \
+            --warning-severity=0 \
+            --report=summary \
+            includes/ prautoblogger.php uninstall.php
+      - name: Commit and push fixes
+        run: |
+          git config user.name "peptiderepo"
+          git config user.email "peptiderepo@users.noreply.github.com"
+          if git diff --quiet; then
+            echo "No changes to commit."
+            exit 0
+          fi
+          git add -A
+          git commit -m "Opik Wave 1: phpcbf autofix (WPCS)"
+          git push origin HEAD:${GITHUB_REF_NAME}