Progression Reborn

Changed

• ported and tweaked custom villager trade changes for vanilla 26.1
• renamed & converted all "polished cut" blocks to "cut polished" blocks
• updated loot table api usage, eliminating a small chance of empty loot being rolled where it shouldn't
• fixed the internal size of rose ore veins not being changed to 10 when modified_nether_ores is enabled (the increase from 8 -> 10 was implemented in the previous release, but mistakingly only when this option was disabled)
• fixed log warning about empty children validation for iron ores