b31a949215
- Added Clone Stamp implementation in `clone_tool.rs` for engine API, enabling pixel sampling and painting functionality. - Introduced a new SVG icon for the Clone Stamp tool. - Created `clone_tool.rs` in the GUI crate to manage Clone Stamp UI state and interactions. - Developed `clone_tool_controls.rs` to render Clone Stamp controls, including size, opacity, hardness, and mirroring options. - Implemented error handling and source status messaging for user feedback in the Clone Stamp workflow.