Colorblind Swap 1.1

- Added Minecraft Java Edition 26.2 compatibility improvements.
- Added proper basic, textured, and textured-lit fallback passes.
- Added a separate post-process output buffer and explicit final pass.
- Fixed undefined reversed smoothstep interpolation during color-mode transitions.
- Replaced legacy ftransform usage with explicit matrix transforms.
- Disabled the unused shadow pass.
- Minor shader cleanup and stability improvements.
- Preserved the original animated color-channel swap effect.
