Unseen

• Bump version
• PacketHider.java:
  • Added ProtocolLib packet listener for PLAYER_INFO packets.
  • Improved distance-based player visibility.
  • OPs always see all players.
• plugin.yml:
  • Added dependency on ProtocolLib.
  • Set api-version to 1.21.8.
• pom.xml:
  • Updated Paper API to 1.21.8-R0.1-SNAPSHOT.
  • Added ProtocolLib dependency.

Fixes

• Fixed null pointer issues when filtering player info.
• Added safe checks for PlayerInfoData.
• Refactored stream filtering to prevent concurrent modification errors.
• /unseen info command removed for simplicity (players no longer see this command).