Added configurable weapons.

AlientAttack.MonoGame/Things/Items/Ammo.cs

@@ -1,6 +1,6 @@
 namespace AlienAttack.MonoGame.Things.Items;
 
-internal class Ammo : Item
+public class Ammo : Item
 {
     protected override PickupKind Kind => PickupKind.Ammo;
 
@@ -8,9 +8,4 @@ internal class Ammo : Item
     {
         TextureName = @$"Sprites\Powerup_Ammo";
     }
-
-    protected override void ApplyEffect(Player player)
-    {
-        
-    }
 }