chore: rename demo app to DesignToolbox (#28)(#60)

* chore: rename demo app to DesignToolbox

* doc : add new entry to changelog

Author: Tayebsed93

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- [DemoApp] Rename demo app to DesignToolbox ([#28](https://github.com/Orange-OpenSource/ouds-flutter/issues/28))
 - [Library] Implement tokens architecture ([#37](https://github.com/Orange-OpenSource/ouds-flutter/issues/37))
 - [Library] Create the basics of a documentation ([#7](https://github.com/Orange-OpenSource/ouds-flutter/issues/7))
 - [Library] Create the basic architecture of the library ([#4](https://github.com/Orange-OpenSource/ouds-flutter/issues/4))

app/lib/main.dart

@@ -45,7 +45,7 @@ class _OudsApplicationState extends State<OudsApplication> {
       child: Consumer<ThemeController>(
         builder: (context, themeController, _) {
           return GetMaterialApp(
-            title: 'OUDS Demo App',
+            title: 'Design System Toolbox',
             theme: themeController.themeData,
             darkTheme: themeController.currentTheme.darkThemeData,
             themeMode: themeController.themeMode,