Add workflow examples for Drupal and WordPress plugins

examples/drupal.yml

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+# GitHub Action for Drupal 11 composer-managed projects
+# Requires drupal/core-dev in require-dev for vendor/bin/phpunit
+name: Testing Drupal
+on: [push, pull_request]
+jobs:
+  drupal:
+    name: Drupal (PHP ${{ matrix.php-versions }})
+    runs-on: ubuntu-latest
+    env:
+      SIMPLETEST_BASE_URL: http://127.0.0.1:8080
+      SIMPLETEST_DB: sqlite://localhost/sites/default/files/.ht.sqlite
+      BROWSERTEST_OUTPUT_DIRECTORY: /tmp/browser_output
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['8.3', '8.4', '8.5']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      # Docs: https://github.com/shivammathur/setup-php
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: apcu, ctype, curl, dom, gd, iconv, intl, mbstring, pdo_sqlite, simplexml, xml, zip
+          coverage: none
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - name: Cache composer dependencies
+        uses: actions/cache@v5
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          # Use composer.json for key, if composer.lock is not committed.
+          # key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install Composer dependencies
+        run: |
+          if [ "${{ matrix.php-versions }}" = "8.3" ]; then
+            composer require --dev drupal/core-dev:11.2.10 doctrine/instantiator:^2.0.0 --no-interaction --no-update
+            composer update drupal/core-dev doctrine/instantiator --with-all-dependencies --no-interaction --no-progress --prefer-dist --optimize-autoloader
+          else
+            composer install --no-interaction --no-progress --prefer-dist --optimize-autoloader
+          fi
+
+      - name: Prepare Drupal test directories
+        run: mkdir -p web/sites/default/files "$BROWSERTEST_OUTPUT_DIRECTORY"
+
+      - name: Start Drupal web server
+        run: php -S 127.0.0.1:8080 -t web >/tmp/php-server.log 2>&1 &
+
+      - name: Test with phpunit
+        # Adjust the test path to match your custom modules or themes.
+        run: vendor/bin/phpunit -c web/core web/modules/custom