feat: add nxtcloud generated code

tests/unit/Controller/ApiTest.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Controller;
+
+use OCA\Nsnm\AppInfo\Application;
+use OCA\Nsnm\Controller\ApiController;
+use OCP\IRequest;
+use PHPUnit\Framework\TestCase;
+
+class ApiTest extends TestCase {
+	public function testIndex() {
+		$request = $this->createMock(IRequest::class);
+		$controller = new ApiController(Application::APP_ID, $request);
+
+		$this->assertEquals($controller->index()->getData()['message'], 'Hello world!');
+	}
+}