Website: [Playground] Add "copy as JSON" option to AST Viewer

[JoshuaKGoldberg]

Before You File a Documentation Request Please Confirm You Have Done The Following...

• I have looked for existing open or closed documentation requests that match my proposal.
• I have read the FAQ and my problem is not listed.

Suggested Changes

The AST Viewer part of the playground can have a lot of objects in it:

It'd be nice to add a little Copy as JSON button to the bottom of the AST viewer that copies its contents as a string to the user's clipboard.

Affected URL(s)

https://typescript-eslint.io/play

[Josh-Cena]

Curious what the use case is?

[JoshuaKGoldberg]

I've personally wanted this a few times when writing docs for ASTs. Also @armano2 had left this as a todo in https://github.com/orgs/typescript-eslint/projects/3. 🤷

[bradzacher]

I've wanted this a few times tbh - it's a nice thing to have to copy into issues and such as you faff around investigating things or building parser changes. Right now it's a pain because you have to manually expand everything in the AST before copying or else you miss out on bits!

It's definitely a lower priority though as it's not often we need to make AST changes or investigate parser bugs.