Itemless Item Frames

While the RP format only aligns with versions between and including 24w21a (1.21) and 1.21.1 it should still work on most other versions too.

34 in 0.1.34 stands for Resource Pack Format 34

This is (of course) the first version. For now it's simply just removing the item in the item frame item texture. It just works right now.