token helper: render auth link as a scannable QR PNG

get-token.ts now writes the Remote Auth URL as a 512x512 QR image
(/tmp/javis_qr.png, override via QR_OUT) in addition to printing the link, so
it can be sent to the user and scanned from a second screen with the Discord
mobile app. Adds the qrcode dependency.

bot/package.json

@@ -16,7 +16,8 @@
     "dotenv": "^16.4.5",
     "libsodium-wrappers": "^0.7.15",
     "opusscript": "^0.1.1",
-    "prism-media": "^1.3.5"
+    "prism-media": "^1.3.5",
+    "qrcode": "^1.5.4"
   },
   "optionalDependencies": {
     "@dank074/discord-video-stream": "^6.0.0",
@@ -24,6 +25,7 @@
   },
   "devDependencies": {
     "@types/node": "^22.7.0",
+    "@types/qrcode": "^1.5.6",
     "typescript": "^5.6.3"
   }
 }