fix: moved manifest and favicon

app/manifest.ts

@@ -1,20 +0,0 @@
-import { MetadataRoute } from 'next';
-
-export default function manifest(): MetadataRoute.Manifest {
-  return {
-    name: 'Newsletter',
-    short_name: 'Newsletter',
-    description: 'Newsletter with top stories from the Hacker News forum',
-    start_url: '/',
-    display: 'standalone',
-    background_color: '#fff',
-    theme_color: '#fff',
-    icons: [
-      {
-        src: '/favicon.ico',
-        sizes: 'any',
-        type: 'image/x-icon'
-      }
-    ]
-  };
-}