DefaultedRegistryValue, Taggable & StringRepresentable expansion

[MrHell228]

SpongeAPI | Sponge

QOL PR with big amount of lines but very small amont of actual changes.

List of changes:

• Currently Taggable has registryType method, and I think it would be nice to have it for DefaultedRegistryValue too to be able to retrieve registry key just from value without need to pass registry. So old DefaultedRegistryValue methods moved to RegisryValue interface (i guess it makes sense).
• #tags & #is in Taggable now defaulted so interface would be more friendly for plugin devs to use.
• All DefaultedRegistryValue and Taggable subtypes now explicitly implement #registryType.
• All vanilla registry types (except WorldType & WorldArchetypeType) implement Taggable because minecraft allows adding tags for them with data packs
• A lot of registry types implement DefaultedRegistryValue because they were missing it
• A lot of registry types implement StringRepresentable because they were missing it
• Added missing builtin tag groups

If override RegistryValue methods in DefaultedRegistryValue, this whole PR shouldn't cause even binary breaking change. Don't know if it's needed though.

[Zidane]

This feels like implementation creep onto the API where taggables must be defaulted registry values.

[MrHell228]

ah, I forgot to revert this line, sorry. (Taggable interface extends DefaultedRegsistryValue even without this PR though)

[MrHell228]

Nuked RegistryValue interface.
Added overloads that take RegistryHolder for methods in DefaultedRegistryValue and Taggable.
Changed return type of Taggable#tags from Collection to Stream