Haste v1.1.4 V40 - Distant Horizons LOD Shading & Water Occlusion

Changes from V39:
- DH LOD terrain gets restrained normal-based directional lighting.
- Slightly compresses highly saturated DH vertex colours, with gentler shading for leaf LODs and snow.
- DH water is restricted to the DH water material ID, checked against both DH solid depth and reconstructed main-world depth, and uses lower opacity.

Important limitation:
Distant Horizons LODs are simplified geometry and their shader path supplies vertex colours/material IDs rather than the normal full-resolution block texture atlas. These changes improve shading, palette balance and compositing but cannot restore detailed leaf/block textures to LODs. That requires texture support through the DH/Iris pipeline.

Built from V39. ZIP integrity verified; shader compilation and in-game appearance still require testing in Minecraft with the target Iris/DH versions.
