Add expo-speech-recognition plugin with permissions

Configure @jamsch/expo-speech-recognition plugin in app.json with
custom permission messages for microphone and speech recognition
access. This enables native STT functionality for the Voice FAB feature.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app.json

@@ -2,7 +2,7 @@
   "expo": {
     "name": "WellNuo",
     "slug": "WellNuo",
-    "version": "1.0.5",
+    "version": "1.0.6",
     "orientation": "portrait",
     "icon": "./assets/images/icon.png",
     "scheme": "wellnuo",
@@ -64,6 +64,13 @@
         }
       ],
       "@config-plugins/react-native-webrtc",
+      [
+        "@jamsch/expo-speech-recognition",
+        {
+          "microphonePermission": "WellNuo needs access to your microphone to listen to your voice commands.",
+          "speechRecognitionPermission": "WellNuo uses speech recognition to convert your voice to text for Julia AI."
+        }
+      ],
       "expo-router",
       [
         "expo-splash-screen",