Salicin: World Heat

New Feature: Heat Captures While Pick Up Block

Blocks can now preserve heat state by capturing it into NBT before removal and restoring it after placement.

By implement ISHeatContainerBlock Interface:

• captureHeatToStack(Level, BlockPos, ItemStack): call before breaking a block, writes heat particles into NBT.
• restoreHeatFromStack(Level, BlockPos, ItemStack): call after placing, reads and restores particles.

New Feature: Heat Source Buoyancy

Heat sources now emit particles with an inherent upward bias, making heat propagation more physically intuitive.

Fix: World Heat Data Persistence

World saves now persist the full heat simulation state across server restarts while setting clearParticlesOnSave to false.

Other Fixes:

• Block Placement Erasing Restored Heat Data
• Thermal Property Mismatches