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.

input/pointer.ts

@@ -5,6 +5,7 @@ export type PointerInputEvent = {
   pointerType: "mouse" | "pen" | "touch";
   position: Vec2D;
   buttons: number;
+  pressure?: number;
   altKey: boolean;
   ctrlKey: boolean;
   metaKey: boolean;