Chore: Specify portrait orientation in PWA manifest

Author: pavanpaik

web/src/app/manifest.ts

@@ -7,6 +7,7 @@ export default function manifest(): MetadataRoute.Manifest {
         description: "Discover the secret plays and profound teachings of Shirdi Sai Baba through recorded Leelas, Bodhakathas, and spiritual guidance.",
         start_url: '/',
         display: 'standalone',
+        orientation: 'portrait',
         background_color: '#4a2511',
         theme_color: '#cc7722',
         icons: [