重构Component相关代码，调整API接口

Runtime/Internal/Misc/ISerieComponent.cs

@@ -0,0 +1,11 @@
+namespace XCharts.Runtime
+{
+    /// <summary>
+    /// The interface for serie component.
+    /// |可用于Serie的组件。
+    /// </summary>
+    public interface ISerieComponent
+    {
+        bool show { get; set; }
+    }
+}

Runtime/Internal/Misc/ISerieContainer.cs

@@ -2,7 +2,6 @@ namespace XCharts.Runtime
 {
     public interface ISerieContainer
     {
-        //bool runtimeIsPointerEnter { get; }
         int index { get; }
         bool IsPointerEnter();
     }

Runtime/Internal/Misc/ISerieDataComponent.cs

@@ -1,9 +1,10 @@
-using UnityEngine;
-using UnityEngine.EventSystems;
-using UnityEngine.UI;
-
 namespace XCharts.Runtime
 {
+    /// <summary>
+    /// The interface for serie data component.
+    /// |可用于SerieData的组件。
+    /// </summary>
     public interface ISerieDataComponent
-    { }
+    {
+    }
 }

Runtime/Internal/Misc/ISerieExtraComponent.cs

@@ -1,11 +0,0 @@
-using UnityEngine;
-using UnityEngine.EventSystems;
-using UnityEngine.UI;
-
-namespace XCharts.Runtime
-{
-    public interface ISerieExtraComponent
-    {
-        bool show { get; set; }
-    }
-}