More Leash Tweaks (#414)

[cynical24]

Description

adds PR #414 from Floof Station
Fansana/floofstation1#414

• Leashes now have configurable length. You can choose the preferred length in the verb menu.
• The short leash proto has been removed and an appropriate prototype migration has been added.
• Leashes were made anchorable (so we can finally keep Seb safe)
• Leash sprites were visually scaled down (70% the original size)
• Shock and bell collars have been reparented to ClothingNeckCollarBase.
• Leash anchors now a visual offset field, that properly incorporates the visual rotation and scaling of the entity.
• Leashes now use a brand new overlay renderer (a refactored JointVisualsOverlay)
• Fixed a bug where the "remove leash" verb would not appear on the respective clothing.