refactor: establish unified viewer workspaces

packages/viewer2d/src/index.ts

@@ -1,3 +1,5 @@
+/// <reference path="./shims.d.ts" />
+
 import { Viewer2D } from './Viewer2D.js';
 import { parseDwgBuffer, type CadParseResult } from './dwgParser';
 import { is2D, isDwg } from './ext2d';