Stone and Smooth Stone chests missing in the latest update (Data Loss)

[vlad0-0]

Description:
After updating the mod (to 1.2.0) and checking the source code, I noticed that STONE and SMOOTH_STONE chest types have been completely removed, while the material list expanded from 18 to 38 types. When reviewing the code, I could not find any Data Fixers or remapping logic for these specific types.

Impact:
This change causes significant data loss for players who used these specific chests in older versions. When loading a world with the new version, all existing Stone and Smooth Stone chests (and their contents) simply vanish because the block IDs are no longer registered.

Suggested solutions:

1. Restore the blocks: Please add STONE and SMOOTH_STONE back to the registry to maintain backward compatibility.
2. Migration path: If removing them was intentional, could you implement a Data Fixer or a remapping system to automatically convert old stone_chest blocks into cobblestone_chest (for example)?

Additional Context:
I have many chests made of Stone in my long-term survival world. Currently, I cannot update the mod directly without losing all my items stored in those chests. I will have to manually move the items to other chests before updating, but it would be great to have a fix for the community.