* feat: Add Eraser 🎉
* Eraser working
* remove unused state
* fix
* toggle eraser
* Support deselect with Alt/Option
* rename actionDelete -> actionErase
* Add util isEraserActive
* show eraser in mobile
* render eraser conditionally in mobile
* use selection if eraser in local storage state
* Add sampling to erase accurately
* use pointerDownState
* set eraser to false in AllowedExcalidrawElementTypes
* rename/reword fixes
* don't use updateScene
* handle bound text when erasing
* fix hover state in mobile
* consider all hitElements instead of a single
* code improvements
* revert to select if eraser active and elements selected
* show eraser in zenmode
* erase element when clicked on element while eraser active
* set groupIds to empty when eraser active
* fix test
* remove dragged distance
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