Expose z to window in the documentation website

[nirtamir2]

Drawing inspiration from the interactive functionality of the lodash website, where one can experiment with _ functions directly in the console, I propose incorporating a similar feature into the Zod library. This enhancement would provide users with the ability to conveniently test validations in real-time, thereby significantly reducing the feedback loop during the utilization of the Zod website. I believe this addition would contribute to a more interactive and user-friendly experience for developers working with Zod. What are your thoughts on implementing such a feature?

[nirtamir2]

I tried to create a PR for this but when I look at the code I notice the feature already exists.
There is a <script src="https://www.unpkg.com/zod/lib/index.umd.js"></script> at the end of the index.html(which is what I would like to add).
It exposes Zod as a global variable that can access (I first look for z instead of Zod).