Add IContextMenu interface & lazy load context menus

Wox.Plugin/Features/IContextMenu.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Wox.Plugin.Features
+{
+    public interface IContextMenu
+    {
+        List<Result> LoadContextMenus(Result selectedResult);
+    }
+}

Wox.Plugin/Result.cs

@@ -68,6 +68,7 @@ namespace Wox.Plugin
             this.SubTitle = SubTitle;
         }
 
+        [Obsolete("Use IContextMenu instead")]
         /// <summary>
         /// Context menus associate with this result
         /// </summary>

Wox.Plugin/Wox.Plugin.csproj

@@ -46,6 +46,7 @@
   <ItemGroup>
     <Compile Include="AllowedLanguage.cs" />
     <Compile Include="EventHandler.cs" />
+    <Compile Include="Features\IContextMenu.cs" />
     <Compile Include="Features\IExclusiveQuery.cs" />
     <Compile Include="Features\IInstantQuery.cs" />
     <Compile Include="IHttpProxy.cs" />