- Introduce Ocean biome enum, builder, and detection logic.
- Add ocean water building to all existing biomes and modify heightmap thresholds for low mountainous areas.
- Skip cave and river generation in Ocean (and River) biomes; avoid carving water blocks.
- Comment out border blending call and update block fill logic.
* feat: add grass texture and update grass_block texture
* feat: add block data
* feat: add blocks_tool
* feat: add sync info and change function in blocks_tools
* feat: add check and new function
* refactor: make block texture loading data-driven
* feat: add rendering for grass
* feat: passable grass
* feat: random grass place
* fix: memory leak in TextureManager::load_cross_plane_texture
