feature: add layers to the gui json configs

[Kamusvalenzuela]

Description

I was trying to put some parent elements and some json files in the background or all in the back of all layers, but there's no chance (or i didnt notice if there's something similar), i mean, ie.
https://discord.com/channels/363106200243535872/708744318860525579/1342852993686442016
There's no way for put all the elements in frontal layers of the yellow container of playerbox.json

Intended Use-Case

Add layers to json UI/UX files

Duplicate Check

• This feature request is not a duplicate to the best of my knowledge.