Merged Items

# Merged Items Adds a merging mechanic for items. Items can "store" other items and will inherit their attribute modifiers. This mod is heavily inspired by the 'Melding' mechanic in the game [Into the Necrovale](https://store.steampowered.com/app/1717090/Into_the_Necrovale/). The mod can be customized extensively. The details can be found in the [Readme on GitHub](https://github.com/TheRedBrain/merged-items/blob/1.21.1/README.md).