fix: move utility types out of .d.ts file to fix exported declaration files (#6315)

src/actions/types.ts

@@ -6,6 +6,7 @@ import {
   ExcalidrawProps,
   BinaryFiles,
 } from "../types";
+import { MarkOptional } from "../utility-types";
 
 export type ActionSource = "ui" | "keyboard" | "contextMenu" | "api";