ModernFix

Depending on the size of this release, there may be a human-readable changelog available on the wiki page.

Changes since 5.19.0+1.21

• Mark the section compile optimization as not required for better compat - embeddedt
• Make state_definition_construct degrade gracefully if map is used like a hashmap - embeddedt
• Remove mod file scan data deduplicator - embeddedt
• Backport unbaked model caching from 1.21 - embeddedt
• Make CTM work on 1.21 - embeddedt
• Fix registry progress bar on 1.21 - embeddedt
• Unfreeze block registry ourselves in tests - embeddedt
• Disable FAPI in dev - embeddedt
• Apply some simple optimizations for vanilla section meshing - embeddedt