XP Cost Changes & Bug fixs

• Modified XP cost system to only deduct XP from the player sending the request
• Removed XP check from handleTpaRequest and handleTpaHereRequest
• XP is now only deducted when the request is accepted in handleTpAccept
• Added new message "insufficient-xp-sender" shown when the sender doesn't have enough XP

Safety Features

• Implemented cancel-on-damage functionality
• Teleportation is cancelled if the player takes damage during the teleport delay
• Can be enabled/disabled in config.yml
• Implemented cancel-on-move functionality
• Teleportation is cancelled if the player moves during the teleport delay
• Can be enabled/disabled in config.yml
• Only checks for actual movement (not just looking around)
• Added new message "teleport-cancelled" shown when teleportation is cancelled

Technical Improvements

• Added Listener interface to handle events
• Added new configuration variables for safety features
• Improved logging in onEnable with information about safety settings
• Added helper method cancelTeleport to handle teleportation cancellation

These changes make the plugin more user-friendly and secure, with better XP cost handling and protection against unwanted teleportations.