Add board service and repository, update routes and assets

- Introduced BoardService and BoardRepository for managing board-related data.
- Updated app routes to reflect the new board screen structure.
- Added new board-related assets to the asset manager.
- Refactored BoardScreen navigation to utilize the new provider structure.

lib/gen/assets.gen.dart

@@ -47,12 +47,21 @@ class $AssetsIconsGen {
   /// File path: assets/icons/arrows.svg
   String get arrows => 'assets/icons/arrows.svg';
 
+  /// File path: assets/icons/board.svg
+  String get board => 'assets/icons/board.svg';
+
+  /// File path: assets/icons/board_active.svg
+  String get boardActive => 'assets/icons/board_active.svg';
+
   /// File path: assets/icons/calendar.svg
   String get calendar => 'assets/icons/calendar.svg';
 
   /// File path: assets/icons/clipboard-text.svg
   String get clipboardText => 'assets/icons/clipboard-text.svg';
 
+  /// File path: assets/icons/clock.svg
+  String get clock => 'assets/icons/clock.svg';
+
   /// File path: assets/icons/close-circle.svg
   String get closeCircle => 'assets/icons/close-circle.svg';
 
@@ -178,8 +187,11 @@ class $AssetsIconsGen {
     arrowUp,
     arrowDownSmall,
     arrows,
+    board,
+    boardActive,
     calendar,
     clipboardText,
+    clock,
     closeCircle,
     dangerFill,
     danger,