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.

web/manifest.json

@@ -3,8 +3,8 @@
     "short_name": "meshcore_sar_app",
     "start_url": ".",
     "display": "standalone",
-    "background_color": "#0175C2",
-    "theme_color": "#0175C2",
+    "background_color": "#ddd",
+    "theme_color": "#fff",
     "description": "A new Flutter project.",
     "orientation": "portrait-primary",
     "prefer_related_applications": false,
@@ -32,4 +32,4 @@
             "purpose": "maskable"
         }
     ]
-}
+}