One Chunk Blocks

Full structure preservation and palette expansion update.

Added

• polished_andesite
• polished_diorite
• polished_granite
• chiseled_quartz_block
• smooth_sandstone
• smooth_red_sandstone
• purpur_pillar
• oak_planks
• spruce_planks
• birch_planks
• jungle_planks
• acacia_planks
• dark_oak_planks
• mangrove_planks
• cherry_planks
• crimson_planks
• warped_planks
• nether_wart_block

Fixed

• full generated structures are preserved across all affected chunks
• structure parts outside the start chunk are no longer turned into chunk blocks
• strongholds, villages, fortresses, spawners, and End Portal blocks are preserved correctly
• Minecraft progression remains fully beatable