Support fast build mode.

支持快速构建模式，真实的实现EditorPlayMode的运行时环境。

Assets/YooAsset/Runtime/PatchSystem/PlayMode/EditorPlayModeHelper.cs

@@ -0,0 +1,37 @@
+#if UNITY_EDITOR
+using System.Reflection;
+
+namespace YooAsset
+{
+	internal static class EditorPlayModeHelper
+	{
+		private static System.Type _classType;
+
+		public static string DryRunBuild()
+		{
+			_classType = Assembly.Load("YooAsset.Editor").GetType("YooAsset.Editor.AssetBundleRuntimeBuilder");
+			InvokePublicStaticMethod(_classType, "FastBuild");
+			return GetPatchManifestFilePath();
+		}
+		private static string GetPatchManifestFilePath()
+		{
+			return (string)InvokePublicStaticMethod(_classType, "GetPatchManifestFilePath");
+		}
+		private static object InvokePublicStaticMethod(System.Type type, string method, params object[] parameters)
+		{
+			var methodInfo = type.GetMethod(method, BindingFlags.Public | BindingFlags.Static);
+			if (methodInfo == null)
+			{
+				UnityEngine.Debug.LogError($"{type.FullName} not found method : {method}");
+				return null;
+			}
+			return methodInfo.Invoke(null, parameters);
+		}
+	}
+}
+#else
+	internal static class EditorPlayModeHelper
+	{
+		public static string DryRunBuild() { throw new System.Exception("Only support in unity editor !"); }
+	}
+#endif