feat(client_coverage): add client coverage feature with user session data use case and dashboard widgets

- Created `client_coverage` feature with necessary dependencies in `pubspec.yaml`.
- Implemented `GetUserSessionDataUseCase` for retrieving user session data.
- Developed `ClientHomeEditBanner` for edit mode instructions and reset functionality.
- Added `ClientHomeHeader` to display user information and action buttons.
- Built `DashboardWidgetBuilder` to render various dashboard widgets based on state.
- Introduced `DraggableWidgetWrapper` for managing widget visibility and drag handles in edit mode.
- Created `HeaderIconButton` for interactive header actions with optional badge support.

apps/mobile/pubspec.lock

@@ -192,6 +192,13 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.4.2"
+  client_coverage:
+    dependency: transitive
+    description:
+      path: "packages/features/client/client_coverage"
+      relative: true
+    source: path
+    version: "1.0.0"
   clock:
     dependency: transitive
     description: