Update kanban board stub to enable drag-and-drop functionality and rename 'completed' column to 'done'

Author: ManukMinasyan

stubs/kanban-board-page.stub

@@ -20,11 +20,11 @@ class {{ class }} extends BoardPage
             ->query($this->getEloquentQuery())
             ->recordTitleAttribute('{{ titleField }}')
             ->columnIdentifier('{{ statusField }}')
-            ->reorderBy('order_column')
+            ->positionIdentifier('position') // Enable drag-and-drop with position field
             ->columns([
                 Column::make('todo')->label('To Do')->color('gray'),
                 Column::make('in_progress')->label('In Progress')->color('blue'),
-                Column::make('completed')->label('Completed')->color('green'),
+                Column::make('done')->label('Done')->color('green'),
             ]);
     }