feat: implement chroma key operation and related keybinds, update workspace panel management

input/tool-keybinds.ts

@@ -3,10 +3,8 @@ import type { Dispatch } from "@commands/dispatcher";
 import type { KeybindEvent } from "./keyboard";
 
 const toolKeybinds = {
-  g: "generate",
   b: "brush",
   e: "eraser",
-  k: "chromaKey",
   w: "magicWand",
   p: "pan",
   s: "select",