Added support for Promenade!

Changelog:

• Added mod support for Promenade.
  This mod has some pretty cool custom snowy leaves- though it was a bit of a pain getting it all setup correctly.

• Refactored some files to simplified their implementation.
  Specifically refactored everything relating to Environmental's Wisteria Leaves to make things easier to comprehend. I did this to make implementing more leaves like this in the future (like the new Promenade Snowy Leaves). There'll be no noticeable difference to users.

• Fixed Conifer Leaf types having their texture shifted up by a pixel.
  The middle right side part of the Compatible Edition's model had it's UV shifted up by one unit. I'm not sure how I missed that this whole time haha.

• Updated the pack.mcmeta to the Text Component format.
• Fixed Mauve Leaves canopy textures going unused, for Regions Unexplored
• Removed the "name": "" string from the pack.mcmeta, as the mod that made used of this, hasn't been updated in two years.