优化更新代码，添加界面功能并整合

WPFluent/Animations/Transition.cs

@@ -0,0 +1,40 @@
+
+
+
+namespace WPFluent.Animations;
+
+/// <summary>
+/// Available types of transitions.
+/// </summary>
+public enum Transition
+{
+    /// <summary>
+    /// None.
+    /// </summary>
+    None,
+
+    /// <summary>
+    /// Change opacity.
+    /// </summary>
+    FadeIn,
+
+    /// <summary>
+    /// Change opacity and slide from bottom.
+    /// </summary>
+    FadeInWithSlide,
+
+    /// <summary>
+    /// Slide from bottom.
+    /// </summary>
+    SlideBottom,
+
+    /// <summary>
+    /// Slide from the right side.
+    /// </summary>
+    SlideRight,
+
+    /// <summary>
+    /// Slide from the left side.
+    /// </summary>
+    SlideLeft,
+}