NeoForge 1.21.1 Port Available

[SajmonOriginal]

NeoForge 1.21.1 Port

Hi! I've created a NeoForge 1.21.1 port of Nemo's Backpacks, available here:
https://github.com/SajmonOriginal/NemosBackpacks/tree/version/1.21.1

What's included:

• Full NeoForge 1.21.1 port (single-module, no multiloader)
• All 102 backpack items (17 colors x 6 material tiers)
• 4 smithing upgrade templates
• Backpack equip slot (slot 46) with inventory mixin system
• Keybinds: B = swap backpack, I = open equipped backpack
• HUD backpack icon rendering
• 3D backpack rendering on player's back (configurable)
• Client config (render backpack on back toggle)
• IS_BACKPACK_OPEN data component
• All recipes, tags, textures, and lang files

API adaptations for NeoForge 1.21.1:

• NeoForge DeferredRegister for items, menus, creative tabs, data components
• NeoForge networking (CustomPacketPayload, RegisterPayloadHandlersEvent)
• @EventBusSubscriber for client events (screens, keybinds, render layers)
• Mixin HEAD injection for Inventory methods (vanilla mutates index parameter)
• Atlas registration for slot icon texture
• Recipe format adapted (crafting_transmute -> crafting_shapeless, result.id format)

Feel free to use this port however you'd like. Happy to discuss any changes or improvements!