feat: add initial dashbot package implementation

- Created a new Dashbot package with core functionalities.
- Implemented Dashbot window model and notifier for state management.
- Added UI components including Dashbot default page and home page.
- Integrated routing for Dashbot with initial routes defined.
- Included assets for Dashbot icons and set up pubspec.yaml.
- Added tests for Dashbot window notifier to ensure functionality.
- Established a basic README and CHANGELOG for the package.

lib/screens/dashboard.dart

@@ -1,10 +1,10 @@
 import 'package:apidash_design_system/apidash_design_system.dart';
+import 'package:dashbot/dashbot.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:apidash/providers/providers.dart';
 import 'package:apidash/widgets/widgets.dart';
 import 'package:apidash/consts.dart';
-import 'package:apidash/dashbot/dashbot.dart';
 import 'common_widgets/common_widgets.dart';
 import 'envvar/environment_page.dart';
 import 'home_page/home_page.dart';
@@ -129,15 +129,15 @@ class Dashboard extends ConsumerWidget {
       ),
       floatingActionButton: isDashBotEnabled
           ? FloatingActionButton(
-              onPressed: () => showModalBottomSheet(
-                context: context,
-                isScrollControlled: true,
-                builder: (context) => const Padding(
-                  padding: EdgeInsets.all(16.0),
-                  child: DashBotWidget(),
+              backgroundColor: Theme.of(context).colorScheme.primaryContainer,
+              onPressed: () => showDashbotWindow(context, ref),
+              child: Padding(
+                padding: const EdgeInsets.symmetric(
+                  vertical: 6.0,
+                  horizontal: 10,
                 ),
+                child: DashbotIcons.getDashbotIcon1(),
               ),
-              child: const Icon(Icons.help_outline),
             )
           : null,
     );