feat: Update app icons and manifest for improved branding and localization support

- Changed AndroidManifest.xml to use new launcher icon.
- Added new launcher icon images for various resolutions in Android mipmap directories.
- Updated iOS project.pbxproj and Info.plist to version 13.
- Refactored iOS AppIcon asset catalog with new icon sizes and updated Contents.json.
- Modified pubspec.yaml to include flutter_launcher_icons for automatic icon generation.
- Updated web manifest colors for better branding.
- Added new favicon and icon images for web support.

android/app/src/main/AndroidManifest.xml

@@ -27,7 +27,7 @@
     <application
         android:label="meshcore_sar_app"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/launcher_icon">
         <activity
             android:name=".MainActivity"
             android:exported="true"