feat: implement GenericResponse class and update controllers to use it for consistent JSON responses

src/Controllers/IndexController.php

@@ -37,7 +37,7 @@ class IndexController extends Controller
     #[UnauthorizedResponse]
     public function get(ServerRequest $request): ResponseInterface
     {
-        return JsonResponseFactory::createJsonResponse(['message' => 'Server is running']);
+        return JsonResponseFactory::createJsonResponse(new GenericResponse('Server is running'));
     }
 
     /**

src/Docs/TokenSecurity.php

@@ -16,4 +16,4 @@ class TokenSecurity extends OA\SecurityScheme
             scheme: 'bearer'
         );
     }
-}
+}

tests/Controllers/IndexControllerTest.php

@@ -20,7 +20,7 @@ class IndexControllerTest extends AbstractController
         $response = $controller->get($this->getMockRequest());
 
         $this->assertEquals(200, $response->getStatusCode());
-        $this->assertEquals('{"status_code":200,"message":"Server is running"}', (string)$response->getBody());
+        $this->assertEquals('{"message":"Server is running","status_code":200}', (string)$response->getBody());
     }
 
     /**
@@ -35,6 +35,6 @@ class IndexControllerTest extends AbstractController
         $response = $controller->post($this->getMockRequest());
 
         $this->assertEquals(200, $response->getStatusCode());
-        $this->assertEquals('{"status_code":200,"message":"Server is running"}', (string)$response->getBody());
+        $this->assertEquals('{"message":"POST request received","status_code":200}', (string)$response->getBody());
     }
 }