Fix BiblioCraft itemstack data void bug

[WaitingIdly]

changes in this PR:

• fix removing the itemstack from a shelf not copying properly, causing it to lose forge capability data (default: true)
• move prior bibliocraft version change

related to Nuchaz/BiblioCraft#681, BluSunrize/ImmersiveEngineering#3216, BluSunrize/ImmersiveEngineering#3232, Flanks255/simplybackpacks#14

[what-the-diff]

PR Summary

• Readme Update:
  A documentation update was made to highlight the improvement in the item copying feature for backpacks.

• Configuration Option Addition:
  A new configuration option is introduced, allowing control over item copying process. This option does require a restart of the Minecraft game.

• Mixin Reference Enhancements:
  We enhanced the handling of "mixin" references (mixins allow for easier modification and enhancement of existing code). Specific references dedicated to version handling and the new item copying functionality were added and renamed for better clarity.

• New Mixin: UTBiblioBlockMixin.java:
  A new code file was introduced that helps with copying items more efficiently, resolving the data loss issues that were occurring previously, in relation to a module called 'Bibliocraft'. This resolves issues with Forge, a tool used in Minecraft for building and managing mods.

• Files & Folders Organization:
  A new organizational system was imposed on a set of code files (mixins), making it easier to identify and manage the code related to BiblioCraft's version and item stack functionalities.

• New & Renamed Mixin Configuration Files:
  We created and renamed configuration files to provide better support and clarity for the 'mixin' functionalities related to item copying in the game 'Bibliocraft'.