TeamClaim model interface: read-only representation of a claimed chunk (teamId, worldName, chunkX, chunkZ, claimedAt).
TeamsClaimService interface: optional extension service for chunk-claim management. Methods: claimChunk, unclaimChunk, unclaimAll, getClaimAt, getTeamClaims, getClaimCount, isClaimed, isClaimedBy, getTeamMaxClaims (-1 means unlimited).
TeamsPowerService interface: optional extension service for player and team power. Methods: getPlayerPower, getPlayerMaxPower, setPlayerPower, getTeamPower, getTeamMaxPower.
TeamClaimEvent (cancellable): fired before a chunk is claimed.
TeamUnclaimEvent (cancellable): fired before a chunk is unclaimed.