Rite of Returning 1.3.1

Soul Spear pivot preserve fix:
- Keeps Soul Spear (4)(1).bbmodel byte-for-byte and unmodified.
- Renderer now uses exact per-cube Blockbench origin values for angled blocks.
- Renderer no longer recenters, normalizes, offsets, or modifies angled-block pivot points.
- Applies to both held Soul Spear renderer and thrown projectile renderer.
- Keeps groups-loader visibility fix.
- Keeps projectile alignment fix.
- Keeps exact look-vector throw, mob bounce/fall behavior, ground stick exact orientation, and trident tags.
