The Sift Paper full-content package

This jar contains:
- The compiled Paper server rewrite.
- The original mod's assets/the_sift and data/the_sift content for preservation/reference.
- The converted resource-pack content under resourcepack/.

Paper loads the plugin classes and plugin.yml. The original Fabric Java classes, Fabric API,
GeckoLib, mixins, and client renderer code are not loaded by Paper. The bundled content is
included so the full source content is preserved in one package; the server rewrite uses
Paper-compatible implementations.
