This update is for Spigot/Minecraft 1.21.3 and has been compiled with Java 21 and Spigot API 1.21.3.
Updates:
1) Added pitch and yaw to the player spawn point location. For existing arenas both values will default to 0. To reset the location so the player is looking in a specific direction when they spawn in the areana, run the command /trsetup configure <arena-name> while standing at the arena spawn point and select Set Player Spawn from the menu.
2) Added RGB/hex colour support to scoreboards and messages.