InvMove

(note: marked as alpha because I did not have time to test every version/loader)
- Update for 1.20
- Workaround for issues with certain freecam mods (gh-19)

Fix wrong jar for 0.8.3 Forge versions

• Changed BackgroundMixin target so it doesn't fail in 1.19.4
  • This change might affect how it works with modded screens, please open an issue if you notice any compatibility problems.
• Fixed performance issue with modid lookup (gh-28)

• Fix quick villager trading (gh-20)
• Fix toggling keys every frame (related to gh-18)
• Some internal changes to help with InvMoveCompats