GameObjectHandler enhancement

[brachy84]

• gohs are now registered with its mod container
• enables usage of mods.modid.goh_name for all gohs added by mods
• if mutiple mods add a goh with the same name you can only use the long version
• goh are no longer transformed into a static method call, instead they are closures now
• added documentation support which shows on hover via lsp (shows what it returns with mod name)
• deprecates IDynamicGroovyProperty. It still works, but its not used here and lsp support was removed. Instead propertties should be added via ExpansionHelper.mixinProperty()
• add helper methods to mixin properties into classes (slightly cursed)
• add initialize(GroovyContainer) method to ModPropertyContainer and deprecate the old one
• deprecate IRegistrar and move its methods to GroovyContainer
• make use of addPropertyFieldsOf() in mod compat
• add Hidden interface for meta methods and properties. This allows methods and properties to hide from suggestions via lsp. Useful to hide alias variations
• goh should now be created via GroovyConatiner#gameObjectHandlerBuilder(), this makes sure its registered correctly for the mod
• add a groovy container and mod property container for vanilla (currently doesnt do much, but intention is generation of examples + wiki)

[WaitingIdly]

most of the comments are about error logging or similar situations still referring to Object Mappers as Game Object Handlers or even Bracket Handlers. this effect also happens in comments/javadocs, but as thats much more internal developer stuff and was largely not part of the diff, was not specifically commented on. these situations should get their terminology modernized.