Tipped arrow color support

[heypr]

Changes

• Modernization of the ItemColor class
• Support for tipped arrows added.

Requested by udnek on Discord.

[mcmonkey4eva]

(marked as draft for now) per Discord discussion earlier, need to make the tag and propertyValue impls match their null case handling to the original logic (one was null and the other defaults to white)

[tal5]

Reposting from Discord - need to use the PropertyParser registration methods for the tag/mech, and the mech can just use setPropertyValue instead of having duplicate logic