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/cakephp/phpunit/MiddlewareTest.template.php

@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Test\TestCase\Middleware;
+
+use App\Middleware\{{MIDDLEWARE_NAME}}Middleware;
+use Cake\Http\Response;
+use Cake\Http\ServerRequest;
+use Cake\TestSuite\TestCase;
+use TestApp\Http\TestRequestHandler;
+
+/**
+ * App\Middleware\{{MIDDLEWARE_NAME}}Middleware Test Case
+ */
+class {{MIDDLEWARE_NAME}}MiddlewareTest extends TestCase
+{
+    /**
+     * Test process method
+     */
+    public function testProcess(): void
+    {
+        // Arrange
+        $middleware = new {{MIDDLEWARE_NAME}}Middleware();
+        $request = new ServerRequest(['url' => '/test-path']);
+        
+        $handler = new class implements \Psr\Http\Server\RequestHandlerInterface {
+            public function handle(\Psr\Http\Message\ServerRequestInterface $request): \Psr\Http\Message\ResponseInterface
+            {
+                return new Response();
+            }
+        };
+
+        // Act
+        $response = $middleware->process($request, $handler);
+
+        // Assert
+        $this->assertInstanceOf(\Psr\Http\Message\ResponseInterface::class, $response);
+        $this->assertSame(200, $response->getStatusCode());
+    }
+}