History Stages

**Full Changelog**: https://github.com/Flix100000/History-Stages/compare/5.3.1-1.20.1…5.4.0-1.20.1 ### New - Added Tier II, III, and IV variants for the Research Pedestal (Tier 3/4 are 2-wide multiblocks). - Added Research Boosters that can be placed under a Research Pedestal to increase research speed and reduce costs. - Added tier gating for stages and boosters, requiring a minimum pedestal tier for certain research. - Added optional client config to hide locked items and recipes in JEI (hideLockedItemsInJei, hideLockedRecipesInJei). - Added a toggle button in the editor for the lockedItemMultiStagePolicy (STRICT/LENIENT). - Added the ability to Ctrl-click an inventory slot in the editor to import its NBT data for criteria creation. - Added styled toast notifications for editor actions, replacing chat-spam feedback. - Moved the add button in the editor to a fixed center position and added an empty-state hint. ### Fixes - Fixed a ConcurrentModificationException on the render thread by using ConcurrentHashMap for stage management. - Removed a stray debug print statement in RecipeManagerMixin.