Improved warp identification & validation

[PrimeAPI]

Summary

Implements waypoint removal and validation logic, extends warp command functionality, and updates GUI teleport behavior.

Changes

• Added /warp remove subcommand (case-insensitive) to delete a waypoint.
• Added case-insensitive lookup for existing warp names in /warp .
• Added beacon existence validation before teleport; auto-removes waypoint if beacon missing.
• -> Updated GUI teleport to pass the appropriate manager for validity removal.
• -> Ensured manager markDirty() call before teleport for state consistency.

Files touched

• WarpCommand.java
• WarpCommandGui.java

[Adrien5902]

Lgtm, Thanks a lot for your work !!