Rite of Returning 1.0.81

Visibility fix:
- Added Phoenix Heart to the Rite of Returning creative tab.
- Added Angel Dragon Heart to the Rite of Returning creative tab.
- Added Soulfire Phoenix Spawn Egg to the Rite of Returning creative tab.
- Added Shadow Angel Dragon Spawn Egg to the Rite of Returning creative tab.
- Added explicit spawn egg item model JSONs.
- Kept the Soulfire Phoenix and Shadow Angel Dragon entity registrations, attributes, renderers, biome spawns, and boss drops.
