MCprep 3.6 RC-3

This is the third and final release candidate for MCprep 3.6, with CommonMCOBJ support (#555) now being merged. All tests are passing on the dev branch, and now we just need to find and iron out any remaining bugs.

As mentioned in the previous release candidate, we highly encourage using CommonMCOBJ worlds, as we plan to phase out support for legacy worlds (by default at least) by the release of MCprep 4.0. See the list of exporters on the official CommonMCOBJ organization for which versions do CommonMCOBJ exports.

Since the previous release (https://github.com/Moo-Ack-Productions/MCprep/releases/tag/3.6.0-rc-2), the following changes have been made:

• jmc2OBJ mappings have been updated
• Textureswap no longer gray out on OBJs exported with unknown exporters, instead now only graying out if an exporter is not detected
• AgX (introduced in Blender 4.0) and Khronos PBR Neutral (introduced in Blender 4.2) have been added to supported built-in color spaces, meaning MCprep will no longer convert MTL files when using those colorspaces
• OBJ header parsing now consumes less memory

Known regressions:

• Find Missing Textures doesn't work properly with jmc2OBJ exports (likely due to mapping changes)
• Prep materials refuses to prep materials if textures are missing (again, likely due to mapping changes)
• Geometry node weather effects can't be spawned in Blender 4.2 (due to data type changes)

This RC is based on 53878d0