* Split custom RemapJarTask logic into a new class
* Split a lot of logic for Arch and Quilt mod metadata into new classes
* ArchitecturyCommonJson: Fix outdated error message
* Add minimal unit tests for ACJ and QMJ
* QuiltModJson: Fix error when there are no injected interfaces
* QuiltModJsonTest: Add test for mixin configs
* QuiltModJsonTest: Move to correct package
* Add tests for creating ACJ and QMJ instances