feat: add comprehensive unit testing support for CakePHP

- Add 4 CakePHP Claude Code skills: cakephp-unit-test, cakephp-test-setup, cakephp-test-review, cakephp-mock-helper
- Add 11 CakePHP PHPUnit component templates (Table, Entity, Controller, Service, Command, Component, Middleware, Mailer, Form, Behavior, Helper)
- Add CakePHP configs (phpunit.xml.dist, app_local.test.php for SQLite in-memory)
- Add comprehensive CakePHP documentation and component guides
- Update test-runner.sh and installer to auto-detect Laravel and CakePHP
- Add CakePHP CI/CD templates for GitHub Actions and GitLab CI
- Update system prompt, verification checklist, and README with dedicated guides

templates/docker/docker-compose.test.yml

@@ -1,7 +1,7 @@
 services:
   test-runner:
     image: php:8.3-cli-alpine
-    container_name: laravel_unit_tester
+    container_name: php_unit_tester
     working_dir: /var/www/html
     volumes:
       - ./:/var/www/html
@@ -15,7 +15,14 @@ services:
       - MAIL_MAILER=array
     command: >
       sh -c "
-        apk add --no-cache sqlite-libs libzip-dev zip unzip git &&
-        docker-php-ext-install pdo pdo_sqlite zip &&
-        php artisan test
+        apk add --no-cache sqlite-libs libzip-dev icu-dev zip unzip git &&
+        docker-php-ext-configure intl &&
+        docker-php-ext-install pdo pdo_sqlite zip intl &&
+        if [ -f 'bin/cake' ]; then
+          bin/cake test app;
+        elif [ -f 'artisan' ]; then
+          php artisan test;
+        else
+          vendor/bin/phpunit;
+        fi
       "