JEI Enhancements

## Features ### Bookmark Management - Group bookmarks together for better organization - Crafting chain mode: automatically calculate required materials based on recipe ratios - Adjustable quantities with Ctrl + Scroll - Vertical/Horizontal layout toggle ### Enhanced Display - Quantity display on bookmarks - Fluid amounts shown in L/kL units - Hold Shift to view stack breakdown (e.g., 128 = 2 × 64) - Hold Alt to view operation hints ### Intuitive Controls - Drag to merge/split bookmark groups - Quick recipe-to-bookmark with Ctrl + Shift + A - Right-click bracket to enable chain calculation mode ## Requirements - Just Enough Items (JEI) ## Notes - Client-side only, no server installation required - More features planned for future updates