feat: add inpaint region functionality and related tools

- Enhanced cursor behavior for new tools: semantic select, mask lasso, and mask rectangle.
- Updated mask edit state to include mask asset ID and kind.
- Implemented inpaint region commands for adding, applying, and removing inpaint regions.
- Introduced new operations for lasso and semantic selection tools.
- Created UI components for candidate review and inpaint region management.
- Added tests for inpaint region commands to ensure functionality.
- Updated various components to support new inpaint features and improve user experience.

editor/initial-state.ts

@@ -31,6 +31,7 @@ export const initialEditorState: EditorState = {
   maskEdit: undefined,
   brushPreview: undefined,
   brushStrokePreview: undefined,
+  maskShapeSession: undefined,
   pointerSession: undefined,
 };
 
@@ -42,6 +43,7 @@ export function createInitialAppState(name = "Untitled"): AppState {
       version: 1,
       artboards: [],
       assets: [],
+      inpaintRegions: [],
     },
     editor: initialEditorState,
     history: { past: [], future: [] },