Functional Sculptures 1.21.11 port fixes (V5)

- Corrected @Mod/@EventBusSubscriber dist annotation encoding for FML 10.0.
- Updated creative tab builder usage.
- Updated client entrypoint/event registration layout.
- Replaced the invalid call to the private vanilla BlockEntityType(BlockEntitySupplier, Set<Block>) constructor with NeoForge 1.21.11's public BlockEntityType(BlockEntitySupplier, boolean, Block...) constructor.

V7 placement + item rendering fixes:
- Replaced invalid direct Authlib PropertyMap construction with a mutable 1.21.11-compatible wrapper.
- Added a 1.21.11 SpecialModelRenderer for exact statue rendering in GUI, hand, ground, frames and head contexts.
- Registered the special renderer through RegisterSpecialModelRendererEvent.
- Migrated all assets/golemstatue/items definitions from flat generated icons to minecraft:special.
