BoatHud for 1.21 (hibi's)

_It is an unofficial port. Nothing changed, just updated to 1.21. [hibi's 1.20 version](https://modrinth.com/mod/boathud)_ # hibi's description: ## Boat Hud A Fabric mod that adds a HUD specifically for boating. Licensed under Unlicense.  This HUD displays some information useful for boating such as drift angle and speed. This mod needs [Cloth Config](https://github.com/shedaniel/cloth-config). To configure, you need [Mod Menu](https://modrinth.com/mod/modmenu).