[Ornithe] add: Data Tag Utils / NbtKeys, etc.

[sakura-ryoko]

• Add: Data Tag / NBT Libraries from 1.21.11 derived for 1.12 with several notes

• add: NbtKeys library
• Update Data Tags system, and stage a few items for Masa to look at; such as adding "EmptyData" and Staging most of the future DFU compat items.
• add: DataOps for future Codec<> DFU use (Commented out)
• add: DataInventory for Abstracting Inventory sources from Data Tags
• add: DataByteBufUtils
• Minor updates to Identifier and RegistryUtils to support Tile Entities
• add: DataTileEntityUtils as a revised/re-written version of the 1.21.11 code.
• add: DataEntityUtils as a revised/re-written version of the 1.21.11 code.
• add: Identifier.of() / DyeColorCode fromString, etc.

[sakura-ryoko]

I am sure there will be questions xD

[sakura-ryoko]

Anyways Masa; the idea here is to bring some "familiar" items to Ornithe; at least in terms of Utility. The IMPL for these NBT parsing functions is a bit jank using custom classes; but it's really the "easiest" way to ensure future proofing the Syntax as much as I can until it requires the use of DataOps and the Registry in future versions; especially when many of the Entity types do not yet exist in Minecraft under 1.12.

And to be fair; I also saw the InventoryView stuff very late in this process; and tried to just "shore horn" it into that folder for the DataInventoryView; so it can more or less co-exist with your existing NBT-based functions.

[sakura-ryoko]

Also, a lot of the Data Tag changes; I added in a way that shouldn't break any of your existing code; but realistically; it's for your review to make the changes when your downstream mods are ready to be verified that they would work as such; and I have omitted the Codec<> stuff for now.