[SUGGESTION] Add an API for Custom Editor Modals.

[hammouda101010]

Discussed on discord: https://discord.com/channels/837024174865776680/1132437506655268926/1347935639546363985

I would think of the ability of adding an API for making custom modals on TurboWarp that would look like this:

I think it could look something like this:

// The default modals
Scratch.gui.prompt()
Scratch.gui.alert()
Scratch.gui.confirm()

// @yuri-kiss suggested to make the API simillar to the addons API.

To be honest it kinda looks like a new JS framework, but it would be cool to see this in action.
so @GarboMuffin , could you please add this to the Scratch API?

[hammouda101010]

ported from TurboWarp/extensions#2016

[LilyMakesThings]

I must've brought this up before, I'm in full support of something like this.