[ASE-Rewrite] Customizable GUI

[DreiFxn]

Is your feature request related to a problem?

none

Describe the solution you'd like.

Customizable GUI, would give more freedome design wise, including e.g. custom textures for items.

tool_1:
  function: movement.fine
  slot: 10
  item: brush 
    active_enchant: true/false
    custom_model_data:
    item_model

For Custom Textures - item_model has been requested trough #699 already.

Describe alternatives you've considered.

there are none

Agreements

• I have searched for and ensured there isn't already an open issue regarding this.
• I have ensured the feature I'm requesting isn't already in the latest ArmorStandEditor Build.

Other

No response