Rite of Returning 1.2.1

Soul Spear real model renderer:
- Removed the fake/generated hand model approach.
- Held Soul Spear now uses a custom BlockEntityWithoutLevelRenderer.
- Custom item renderer loads the actual uploaded Soul Spear.bbmodel:
  assets/riteofreturning/models/item/soul_spear.bbmodel
- Custom item renderer uses the actual uploaded embedded texture:
  assets/riteofreturning/textures/item/soul_spear.png
- Projectile also uses the actual uploaded Soul Spear.bbmodel:
  assets/riteofreturning/models/entity/soul_spear_projectile.bbmodel
- Projectile also uses the actual uploaded embedded texture:
  assets/riteofreturning/textures/entity/soul_spear_projectile.png
- Item JSON now uses builtin/entity so Forge uses the custom item renderer.
- Direct look-vector throwing retained.
