Horse Stamina / Sprinting

[BoltyDawg]

• Similar to vanilla pigs, right clicking with a carrot on a stick while mounted on a horse will cause the horse to start sprinting and drain its stamina
• Sprinting gives the horse a percentage speed boost
• Stamina will be displayed via a bossbar
• The carrot on a stick loses durability upon use
• Try to see if I can slow the horse's turn rate while sprinting, making it more optimal for straightaways

The main goal of this feature is to add an additional level of skill to horse racing, because now players will have to manage stamina regeneration and, for longer races, carrot durability. It's not really aimed at general "get from point a to point b" usage, but by all means can and will be used for that: it just might not be the most convenient thing.

Side note: maybe add collision between different horses when they're being ridden? Would make for much more intense races, but might be very difficult to implement efficiently