Item Blacklist

This is an extremely significant release for multiple reasons!

• I have returned to modding from a long hiatus, and will start actively maintaining those of my mods that were popular before I left
• The mod is stable enough to be marked as a release rather than an alpha or beta

This release updates the mod to Minecraft 1.21.11, adds the clearBlacklist command to clear the blacklist completely, removes the per-dimension blacklist (items that were removed in one dimension were unable to be reobtained in the other; hence, this feature didn't make much sense), and fixes an issue where players were able to drop blacklisted items upon death.

Feel free to open an issue on GitHub if you experience any problems!