wave behavior and fixed explosion

managers/Wave/SingleWave.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+using Godot;
+
+namespace Movementtests.managers;
+
+
+[GlobalClass]
+public partial class SingleWave(EnemyDescription[] enemies) : Resource
+{
+    [Export] public Godot.Collections.Dictionary<EnemyDescription, int> EnemiesToSpawn { get; set; } = [];
+    
+    public SingleWave() : this([]) {}
+}