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

src/data/restore.ts

@@ -34,6 +34,7 @@ import { bumpVersion } from "../element/mutateElement";
 import { getUpdatedTimestamp, updateActiveTool } from "../utils";
 import { arrayToMap } from "../utils";
 import oc from "open-color";
+import { MarkOptional, Mutable } from "../utility-types";
 
 type RestoredAppState = Omit<
   AppState,