Variants-CIT

• Fixed a crash when providing bad regex substitutions.

• component_format variables may now take a fallback.
• component_format variables can now use regex.
• Fixed a crash on malformed json.
• Fixed overly lenient json parsing, often failing silently with a fallback, instead of showing an error in the log.

• Fixed crash when a module targets a non-existent item type.

• Ported to MC 1.21.5
• Removed Item State extensions introduced in v3

Lots of changes in how Minecraft handles NBT and item components. Be on the lookout for unexpected behaviour changes.

• Added module: item_count
• Module axolotl_variant now has built-in support for baby variants.
• Modules component_data and component_format can now use non-component and non-nbt based properties: item_type, axolotl_variant, bucket_entity_age, painting_variant. It is now viable for a single module to handle multiple item types with each their own set CITs.
• Fixed some regressions from v2.9/v3.4 and other issues related to component_format, component_data etc.

• Fixed crash when loading a fallback model. (Regression introduced in v3.4.1)

• Fixed special models not loading properly. (Regression introduced in v3.0)