Lots more work on implementing battling

PkmnLib.Dynamic/ScriptHandling/ScriptContainer.cs

@@ -1,5 +1,6 @@
 using System.Collections;
 using System.Diagnostics.CodeAnalysis;
+using PkmnLib.Static.Utils;
 
 namespace PkmnLib.Dynamic.ScriptHandling;
 
@@ -29,7 +30,7 @@ public class ScriptContainer : IEnumerable<ScriptContainer>
     /// <summary>
     /// The script in this container.
     /// </summary>
-    public Script? Script { get; set; } = null;
+    public Script? Script { get; private set; }
 
     /// <inheritdoc />
     public IEnumerator<ScriptContainer> GetEnumerator()
@@ -42,4 +43,27 @@ public class ScriptContainer : IEnumerable<ScriptContainer>
     {
         return GetEnumerator();
     }
+
+    public void Set(Script script)
+    {
+        if (Script is not null)
+        {
+            Script.OnRemove();
+            Script.MarkForDeletion();
+        }
+        Script = script;
+    }
+
+    /// <summary>
+    /// Removes the script from this container.
+    /// </summary>
+    public void Clear()
+    {
+        if (Script is not null)
+        {
+            Script.OnRemove();
+            Script.MarkForDeletion();
+        }
+        Script = null;
+    }
 }