feat: main framework complete.

app/lib/extensions/shared_preferences_extension.dart

@@ -0,0 +1,13 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+extension SharedPreferencesExtenstion on SharedPreferences {
+  Future<bool> updateInt(String key, int value) {
+    if (this.getInt(key) == value) return Future.value(false);
+    return this.setInt(key, value);
+  }
+
+  Future<bool> updateString(String key, String value) {
+    if (this.getString(key) == value) return Future.value(false);
+    return this.setString(key, value);
+  }
+}