[REQUEST] Add Itemizer support

[SirFancyBacon]

Hello,
would it be possible to add support to reference Itemizer items for items?
https://github.com/OnapleRPG/Itemizer

I'd like to make a series of custom items that monsters drop and use them as costs to run various commands using your plugin.

[SirFancyBacon]

Adding Byte-Item support would make this request less valid as you can register the Itemizer item within Byte-Items.

still would like Itemizer support though :)

[ustc-zzzz]

ByteItem support was added in acb8220.