[suggestion] Add support for CustomModelData Icons inside packinfo.yml
Summary
Add support inside packinfo.yml files in order tu setup Icons with CustomModelData attributes
Usage
Add a parameter called CustomModelData inside packinfo.yml in order to override the NBT data of MATERIAL used to display the Pack Icon.
Value
Developers users can create custom Icons for his packs to improve quality. Only admin users who has access to /mmmenu will notice this change.
Priority
Very low. Impact just for server-admin users with access to /mmmenu
Implementation
Add a new parameter inside packinfo.yml called CustomModelData, if it is defined use that number to create the ItemStack inside the menu. Else use NO CustomDataModel in the icon.