Add team system and team-based win condition

Introduce a full in-memory team system and integrate it into gameplay and UI.

- Add Team, TeamManager, TeamListener and TeamCommand to manage teams, invites, accept/deny, leave, kick and info. TeamManager stores teams and pending invites (INVITE_TTL_MS) using concurrent maps and exposes helper/query methods (areInSameTeam, allAliveInSameTeam, getInviterFor, cleanExpiredInvites, reset).
- Wire TeamManager into SpeedHG: initialize, schedule periodic invite cleanup, register command and listener, and reset teams on plugin disable.
- Update GameManager to consider teams for win conditions, build team winner names, exclude teammates from random teleport/compass logic, and credit all winning team members for stats/ranking.
- Move ability charge feedback out of individual kits into KitEventDispatcher: remove per-kit onFullyCharged overrides and add centralized ActionBar/sound feedback (sendChargeUpdateActionBar/sendChargeReadyActionBar). ActiveAbility no longer defines onFullyCharged.
- Make OraclePerk ignore teammates when finding nearest enemy.
- Add config entries for teams and corresponding language strings; tweak some default values in CustomGameSettings (gladiator arena radius/height and minor formatting changes).

These changes enable 2-player teams (configurable), friendly-fire prevention, invite lifecycle handling, and team-aware endgame logic.

src/main/kotlin/club/mcscrims/speedhg/game/GameManager.kt

@@ -274,15 +274,27 @@ class GameManager(
 		checkWin()
 	}
 
-	private fun checkWin()
-	{
-		if ( currentState != GameState.INGAME && currentState != GameState.INVINCIBILITY ) return
+	private fun checkWin() {
+		if (currentState != GameState.INGAME && currentState != GameState.INVINCIBILITY) return
 
-		if ( alivePlayers.size <= 1 )
-		{
+		val teamManager = plugin.teamManager
+
+		val roundOver = when {
+			// Nur noch 0 oder 1 Spieler übrig → immer Ende
+			alivePlayers.size <= 1 -> true
+
+			// Teams aktiv: Alle Überlebenden im selben Team → Team gewinnt
+			teamManager.isEnabled && teamManager.allAliveInSameTeam(alivePlayers) -> true
+
+			else -> false
+		}
+
+		if (roundOver) {
 			val winnerUUID = alivePlayers.firstOrNull()
-			val winnerName = if ( winnerUUID != null ) Bukkit.getPlayer( winnerUUID )?.name ?: "N/A" else "N/A"
-			endGame( winnerName )
+			// Den sichtbaren Gewinner-Namen ermitteln:
+			// Bei Team-Sieg alle Mitglieder des Gewinner-Teams anzeigen.
+			val winnerName = buildWinnerName(winnerUUID)
+			endGame(winnerName)
 		}
 	}
 
@@ -296,18 +308,18 @@ class GameManager(
 
 		val winnerUUID = alivePlayers.firstOrNull()
 
+		val winnerTeam = if ( plugin.teamManager.isEnabled && winnerUUID != null )
+			plugin.teamManager.getTeam( winnerUUID ) else null
+
 		Bukkit.getOnlinePlayers().forEach { p ->
-			if ( p.uniqueId == winnerUUID )
+			val isWinner = winnerTeam?.contains( p.uniqueId ) ?: ( p.uniqueId == winnerUUID )
+
+			if ( isWinner )
 			{
 				plugin.statsManager.addWin( p.uniqueId )
 				plugin.rankingManager.onPlayerResult( p, isWinner = true )
 			}
-		}
 
-		plugin.kitManager.clearAll()
-		plugin.perkManager.removeAllActivePerks()
-
-		Bukkit.getOnlinePlayers().forEach { p ->
 			p.showTitle(Title.title(
 				p.trans( "title.win-main", "winner" to winnerName ),
 				p.trans( "title.win-sub" )
@@ -315,6 +327,9 @@ class GameManager(
 			p.sendMsg( "game.win-chat", "winner" to winnerName )
 		}
 
+		plugin.kitManager.clearAll()
+		plugin.perkManager.removeAllActivePerks()
+
 		plugin.discordWebhookManager.broadcastEmbed(
 			title = "🏆 Spiel beendet!",
 			description = "**$winnerName** hat das Spiel gewonnen! GG!",
@@ -328,6 +343,25 @@ class GameManager(
 
 	// --- Helfer Methoden ---
 
+	private fun buildWinnerName(anyAliveUUID: UUID?): String {
+		anyAliveUUID ?: return "N/A"
+
+		val teamManager = plugin.teamManager
+		if (!teamManager.isEnabled) {
+			return Bukkit.getPlayer(anyAliveUUID)?.name ?: "N/A"
+		}
+
+		val winnerTeam = teamManager.getTeam(anyAliveUUID)
+		return if (winnerTeam != null && winnerTeam.size > 1) {
+			// "PlayerA & PlayerB" als Team-Gewinner-String
+			winnerTeam.members
+				.mapNotNull { Bukkit.getPlayer(it)?.name }
+				.joinToString(" & ")
+		} else {
+			Bukkit.getPlayer(anyAliveUUID)?.name ?: "N/A"
+		}
+	}
+
 	private fun teleportRandomly(
 		player: Player,
 		world: World,
@@ -368,6 +402,10 @@ class GameManager(
 			{
 				if ( p == target ) continue
 
+				if ( plugin.teamManager.isEnabled &&
+					plugin.teamManager.areInSameTeam( p, target ))
+					continue
+
 				val dist = p.location.distanceSquared( target.location )
 				if ( dist < minDistance )
 				{