Migrate FightSystem modes and countdowns to GameCore

- Move shared arena-mode abstractions into GameCore
- Adapt fight countdowns and APIs to the shared model
- Add SteamWar issue audit workflow and SQL language settings

TowerRun/src/de/steamwar/towerrun/game/TowerRunGame.java

@@ -20,6 +20,7 @@
 package de.steamwar.towerrun.game;
 
 import de.steamwar.core.CraftbukkitWrapper;
+import de.steamwar.gamecore.wincondition.GameResult;
 import de.steamwar.sql.SteamwarUser;
 import de.steamwar.towerrun.TowerRun;
 import de.steamwar.towerrun.config.Config;
@@ -119,6 +120,14 @@ public class TowerRunGame {
         }
     }
 
+    public static void complete(GameResult<TowerRunPlayer> result) {
+        if (result instanceof GameResult.Winner<TowerRunPlayer> winner) {
+            win(winner.getWinner());
+        } else {
+            tie();
+        }
+    }
+
     public static void win(TowerRunPlayer tPlayer) {
         Bukkit.getOnlinePlayers().forEach(player -> player.setGameMode(GameMode.SPECTATOR));
         PLAYERS_ALIVE.clear();