Up to 26.1

• Updated to 1.21.11
• Moved the vanilla CIT from the overlay folder to the main asset
• Pack is now compatible with vanilla even if marked red

• Added support to the upcoming spear (same renames as the axes and sword, minus gaurd sword and zeru axe)
• Added copper tier
• Added support for copper swords, axes, hoes and spears

Changed min pack version from 15 to 16, wich mean it will be marked as red on 1.20/1.20.1, but still work.

• Updated to new Mcmeta format (snapshot 25w31a)
• Due to change in shader core, emissive does not work in vanilla from 1.21.6 and up.