Add NLT, CSB and NASB via api.bible proxy; new app logo and icons

Reader and Reading Plans get a translation picker. Licensed translations are
fetched through a server-side api.bible proxy so the key stays off the client.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/manifest.json

@@ -19,7 +19,13 @@
       "src": "/icon-512.png",
       "sizes": "512x512",
       "type": "image/png",
-      "purpose": "any maskable"
+      "purpose": "any"
+    },
+    {
+      "src": "/icon-maskable-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
     }
   ]
 }