added subscription rest api controller and route

appinfo/routes.php

@@ -7,5 +7,6 @@ return [
         'resources' => [
         ],
         'routes' => [
+			['name' => 'subscription#destroy', 'url' => '/subscriptions/{id}', 'verb' => 'DELETE']
         ]
 ];

lib/Controller/SubscriptionController.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace OCA\DavPush\Controller;
+
+use OCA\DavPush\AppInfo\Application;
+use OCA\DavPush\Service\SubscriptionService;
+
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\AppFramework\Http\Attribute\NoAdminRequired;
+use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
+use OCP\IRequest;
+
+class SubscriptionController extends Controller {
+	/** @var SubscriptionService */
+	private $service;
+
+	/** @var string */
+	private $userId;
+
+	use Errors;
+
+	public function __construct(
+		IRequest $request,
+		SubscriptionService $service,
+		$userId
+	) {
+		parent::__construct(Application::APP_ID, $request);
+		$this->service = $service;
+		$this->userId = $userId;
+	}
+
+	#[NoAdminRequired]
+	#[NoCSRFRequired]
+	public function destroy(int $id): JSONResponse {
+		return $this->handleNotFound(function () use ($id) {
+			$this->service->delete($this->userId, $id);
+			return [
+				'success' => True,
+			];
+		});
+	}
+}