优化更新代码，添加界面功能并整合

ShrlAlgo.Toolkit.Revit/Assist/ApplicationAssist.cs

@@ -0,0 +1,31 @@
+using System.Windows;
+using System.Windows.Interop;
+using Autodesk.Revit.DB;
+
+namespace ShrlAlgo.Toolkit.Revit.Assist
+{
+    public static class ApplicationAssist
+    {
+        /// <summary>
+        /// 显示窗口
+        /// </summary>
+        /// <param name="window"></param>
+        /// <param name="handle"></param>
+        public static void Show(this Window window, IntPtr handle)
+        {
+            // ReSharper disable once ObjectCreationAsStatement
+            _ = new WindowInteropHelper(window) { Owner = handle };
+            window.Show();
+        }
+        /// <summary>
+        /// 新建族文档
+        /// </summary>
+        /// <param name="app"></param>
+        /// <param name="templateFileName">族样板文件名，不含扩展</param>
+        /// <returns></returns>
+        public static Document NewFamilyDocument(this Autodesk.Revit.ApplicationServices.Application app, string templateFileName)
+        {
+            return app.NewFamilyDocument($"{app.FamilyTemplatePath}\\{templateFileName}.rft");
+        }
+    }
+}