feat: throw 404 when movie/tv show doesnt exist

also adds site webmanifest for mobile icons and title changes for tv/movie pages

server/interfaces/api/requestInterfaces.ts

@@ -0,0 +1,6 @@
+import type { PaginatedResponse } from './common';
+import type { MediaRequest } from '../../entity/MediaRequest';
+
+export interface RequestResultsResponse extends PaginatedResponse {
+  results: MediaRequest[];
+}