Spawn N' Warps

Add dimension-aware per-warp cooldowns

• Added persistent, independently configurable cooldowns for every warp.
• Added operator commands for warp and spawn cooldown management.
• Added modded dimension names to /warps and cross-dimension warp travel.
• Corrected damage cancellation so an already-injured player can use /warp.
• Fixed issues with /warps not being able to be used by non operators.