add version nunber in theme data

Frontend/lib/mih_theme/mih_theme.dart

@@ -13,6 +13,7 @@ class MihTheme {
   late String loadingAssetText;
   late TargetPlatform platform;
   bool kIsWeb = const bool.fromEnvironment('dart.library.js_util');
+  String latestVersion = "1.1.2";
   // Options:-
   // f3f9d2 = Cream
   // f0f0c9 = cream2
@@ -104,6 +105,10 @@ class MihTheme {
     mode;
   }
 
+  String getLatestVersion() {
+    return latestVersion;
+  }
+
   ThemeData getThemeData() {
     return getData();
   }