Mo' Bends - 1.12.2 exclusive fixes! (Patreon)

While I work on the visual editor, I took some time to fix bugs in the 1.12.2 version since it's the one that's going to be used until 1.16.5 gets released <3. Shouldn't be many bugs but let me know if any appear!

Changelist:

- The spin attack has been brought back. (configurable)

- Users can now configure which items are regarded as weapons using wildcards.

- An option to specify which armors should be kept vanilla has also been added.

- Fixed a lot of glitches that occurred when wearing multiple items from different armor sets at once.

- The second skin layer is now scaled and positioned more correctly.

- Walking up/down stairs is now detected a lot better during multiplayer.