Rite of Returning 1.3.9

Model replacements:
- Replaced Death's Thalleous / Death's Shadow item model with Void Blade (1).bbmodel.
- Replaced Soulfire Broadsword item model with Soul Sword (1).bbmodel.
- Both uploaded bbmodels are copied byte-for-byte and are not modified.
- Extracted embedded textures from both bbmodels.
- Added custom item renderers using the same bbmodel renderer path used before.
- Kept current Soul Spear 1.3.8 changes and latest Scrapper changes.
