feat(04-zkapp-ui-with-react.mdx): add description of comlink and inst…

…allation instructions

docs/zkapps/tutorials/04-zkapp-ui-with-react.mdx

@@ -125,7 +125,18 @@ Start by deleting the default `page.tsx` file that comes with a new project so t
   ```sh
   $ rm app/page.tsx
   ```
+### Install UI dependencies
 
+This tutorial uses the `comlink` package to integrate web workers into the React application. Comlink simplifies 
+communication between the main thread and web workers by abstracting the postMessage API, allowing you to call functions in the worker as if they were local.
+
+In the `04-zkapp-browser-ui/ui` directory, install `comlink` by running the following command:
+
+```sh
+$ npm install comlink
+```
+
+This example uses to comlink package for seamless integration of webworkers
 ## Build the default contract
 
 This tutorial uses the default contract `Add` that is always scaffolded with the `zk project` command.