Better GUI For Sophisticated Backpacks

 _The texture pack offers two cosmetic options: Standard and Connected._ Material beautification source reference: CozyUI+. Please use with the corresponding material pack. Version: neoforge 1.21.x，For other versions, please test independently and inform me of results. This material pack adheres to the GPL-3.0 License. Contact me for source files if needed. Mod：**[sophisticated-backpacks](https://modrinth.com/mod/sophisticated-backpacks)** Recommended for use Resource PacksI：**[CozyUI+](https://modrinth.com/resourcepack/cozyui-plus)**