feat: add nxtcloud generated code

lib/Controller/PageController.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Nsnm\Controller;
+
+use OCA\Nsnm\AppInfo\Application;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\Attribute\FrontpageRoute;
+use OCP\AppFramework\Http\Attribute\NoAdminRequired;
+use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
+use OCP\AppFramework\Http\Attribute\OpenAPI;
+use OCP\AppFramework\Http\TemplateResponse;
+
+/**
+ * @psalm-suppress UnusedClass
+ */
+class PageController extends Controller {
+	#[NoCSRFRequired]
+	#[NoAdminRequired]
+	#[OpenAPI(OpenAPI::SCOPE_IGNORE)]
+	#[FrontpageRoute(verb: 'GET', url: '/')]
+	public function index(): TemplateResponse {
+		return new TemplateResponse(
+			Application::APP_ID,
+			'index',
+		);
+	}
+}