feat: Add StageDialogStyler for enhanced dialog management

- Introduced StageDialogStyler class to render child-facing dialogs as shared in-stage cards.
- Preserved native AcceptDialog/ConfirmationDialog signals for stage workflows.
- Implemented methods for applying styles, managing visibility, and handling button actions.
- Added support for dynamic theming and responsive design based on viewport size.
- Created utility functions for styling buttons and managing dialog content.

.gitignore

@@ -8,6 +8,7 @@ addons/
 *.import
 # Local scratch captures, logs, and temporary browser profiles
 /tmp/
+/work/
 content/review/artist/
 content/examples/
 /tests/godot_test_user_data/