TAILSTECH ABYSS V11 CLIENT VISUALS

- Cancels only the vanilla WATER block-screen overlay while in abyss:the_abyss.
- Custom fog is active throughout The Abyss, including while the camera is above the waterline.
- Fog distance smoothly tightens with depth: ~112 blocks at the surface toward ~10 blocks at the deepest floor.
- Fog color smoothly darkens from muted deep-ocean blue at the surface to near-black at depth.
- Existing v10 portal animation, quadrant mapping, no-particle portal, terrain and fauna retained.
