所有Simple UI Element，以及Composite Parameter Window初步

Assets/Scripts/DynamicUI/DynamicUIElements/Composite/DynamicUICompositeUnit.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Serialization;
+using UnityEngine.UI;
+
+namespace Ichni.Editor
+{
+    public abstract class DynamicUICompositeUnit : MonoBehaviour
+    {
+        public CompositeParameterWindow compositeParameterWindow;
+        public Button removeButton;
+        public abstract void SetUnit(CompositeParameterWindow list, object itemContent);
+    }
+}