Fixes

- fix: anglecolor (#3043)
- fix: correctly save block orientations in structure schematics (#3033)
- fix: make RegionMaskingFilter upstream compatible again (#3030)
- fix: spawner type in pattern (#3042)
- feat: implement command to fix block connections (#2746)
- Optimize layer iteration to prevent performance overhead. (#3022)
- Fix //snow (#3019)

✨ Features

- Allow lazy-loading chunk section data when using Vector API (#3035)
- 1.21.4 (#3021)
- feat: implement command to fix block connections (#2746)
- Reduce lock contention caused by regen pattern (#3046)
- Simplify heightmap calculation and avoid loading empty sections (#3045)

✅ Chore

- Simplify NMSAdapter#createPalette methods (#3036)
- Reduce code duplication of PaperweightBlockMaterial (#3041)