Fix breaking change introduced in v5.5

https://devblogs.microsoft.com/typescript/announcing-typescript-5-5/#simplified-reference-directive-declaration-emit

packages/web_ui/src/index.ts

@@ -1,4 +1,4 @@
-/// <reference path="../global.d.ts" />
+/// <reference path="../global.d.ts" preserve="true" />
 export { default as bootstrap } from "./bootstrap";
 export { default as notify, notifyErrorHandler } from "./util/notify";
 export { default as BaseWebPlugin } from "./BaseWebPlugin";