Clear player potion effects on class reset

Ensure active potion effects are removed when resetting a player's class. This prevents lingering effects from other classes, maintaining consistent game behavior.

src/main/java/com/alttd/ctf/game_class/GameClass.java

@@ -86,6 +86,7 @@ public abstract class GameClass {
         player.setHealth(health);
         //Always reset the player inventory since other classes might have had them get items
         player.getInventory().clear();
+        player.clearActivePotionEffects();
 
         player.getInventory().setContents(tools.toArray(ItemStack[]::new));
         TeamColor color = teamPlayer.getTeam().getColor();