Stonecutter Fix

Fixes the horrendous “UnsupportedOperationException” when clicking in the stonecutter output, and shift clicking.

Mainly client side, but it’s recommended to also install server side to avoid any item losses due to desync.

Got to this since i was playing with my boyfriend with 400+ mods installed, and realised, shit, the stonecutter makes our client crash. So i dove into the crash log and saw the mixin errors and searched online, searched githubs and nothing. So i made this shit. And it’s absolutely horrid but hey, it’s a fix and it WORKS. It fixed the stonecutter for me and my boyfriend so… success?