Add some helpers and wrappers, bump libac-dart dep

lib/Constants.dart

@@ -2,5 +2,19 @@ import 'package:flutter/material.dart';
 
 class LibACFlutterConstants {
   static const Color TITLEBAR_COLOR = Color.fromARGB(255, 99, 0, 0);
-  static const VERSION = "1.0.031525+0222";
+  static const VERSION = "1.0.052525+0051";
+}
+
+/// A simple helper for obtaining the theme, and allowing toggle of the dark mode state
+class LibACFlutterTheme {
+  /// Default is true
+  static bool isDarkMode = true;
+
+  static ThemeData GetTheme() {
+    if (isDarkMode) {
+      return ThemeData.dark();
+    } else {
+      return ThemeData.light();
+    }
+  }
 }