Lithostitched

Fix pack metadata issues on 1.21.9.

Full release of Lithostitched 1.5. View changes in the technical changelog here.

Restructured mod to target 1.21.1 and 1.21.9. If no issues are found, this will be the full release of 1.5.0.

View changes in the technical changelog here.

Fixed crashing from Beta 2 on Neoforge.