Add an NBT converter for components on Velocity

[FluxCapacitor2]

This is a workaround to allow Prototolize to send NBT components until KyoriPowered/adventure#995 is resolved.

Using Velocity's ComponentHolder, I convert the component to an Adventure NBT tag (see adventure-nbt), then convert the Adventure NBT tag to a Querz NBT tag using a custom mapper class.

Basic testing with item names, lores, and inventory titles (using Protocolize's OpenWindow and WindowItems packets) works fine on 1.20.4.

I have not tested on lower versions or old versions of Velocity that don't support 1.20.3 and therefore don't have a ComponentHolder class. Let me know if there is a better way to get the protocol version than hard-coding ProtocolVersion.MINECRAFT_1_20_3.

[Exceptionflug]

It's sufficient for now. Thank you for your contribution. The Adventure to Querz NBT mapper would have been necessary anyway so thank you also for including that.