Muddy World

## Muddy World 0.11.0-beta for Minecraft 1.21.1

### Added
- Added Minecraft 1.21.1 support.
- Added a dedicated Fabric 1.21.1 build of Muddy World.

### Changed
- Ported Muddy World from Minecraft 26.2 to Minecraft 1.21.1.
- Updated Fabric, Yarn, Loom, and Java compatibility for Minecraft 1.21.1.
- Adapted client rendering code for Minecraft 1.21.1.
- Adapted terrain conversion and finalizer logic for Minecraft 1.21.1.
- Preserved the same gameplay behavior as the 26.2 version.

### Fixed
- Fixed Muddy Grass texture and item rendering issues in the 1.21.1 port.
- Fixed Viscous Mud inside fog color in the 1.21.1 port.
- Fixed Viscous Mud menu overlay rendering in the 1.21.1 port.
- Fixed Viscous Mud hand and held item darkening in the 1.21.1 port.
- Fixed Viscous Mud inside overlay behavior in the 1.21.1 port.
- Fixed terrain conversion triggering falling block physics during generation/finalizer conversion.

### Included Features
- Muddy terrain generation in wet biomes.
- Water-contact mud conversion.
- Wet-biome climate conversion.
- Natural mud drying.
- Lava and Nether drying behavior.
- Viscous Mud and Viscous Mud Bucket.
- Decorative persistent mud from Water Bottle interaction.
- Biome tag and datapack compatibility.
- Optional Rooted Trees compatibility.

### Notes
- This is a port of Muddy World 0.11.0-beta to Minecraft 1.21.1.
- Fabric API is required.
- Rooted Trees compatibility is optional.
- If Rooted Trees is not installed, Muddy World works normally.