Use Shmueli's COM server to fix ARM (#38090)

More than a couple people hit mYsTeRiOuS iSsUeS on ARM. Extensions would load the first time, but never again. Their processes would start, but the objects would fail to load.

Fortunately, @azchohfi discovered that using `Shmuelie.WinRTServer`, rather than the one pilfered from devhome, doesn't have this problem.

I don't have an ARM machine to validate the changes, but @lauren-ciha thankfully did the groundwork to get this validated in their extension, so I think this should work. 

Closes https://github.com/zadjii-msft/PowerToys/issues/97

src/modules/cmdpal/ExtensionTemplate/TemplateCmdPalExtension/Directory.Packages.props

@@ -10,6 +10,7 @@
     <PackageVersion Include="Microsoft.Windows.CsWinRT" Version="2.2.0" />
     <PackageVersion Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.2428" />
     <PackageVersion Include="Microsoft.WindowsAppSDK" Version="1.6.250205002" />
+    <PackageVersion Include="Shmuelie.WinRTServer" Version="2.1.1" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
     <PackageVersion Include="System.Text.Json" Version="9.0.3" />
   </ItemGroup>

src/modules/cmdpal/ExtensionTemplate/TemplateCmdPalExtension/TemplateCmdPalExtension/Program.cs

@@ -2,28 +2,32 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using Microsoft.CommandPalette.Extensions;
+using Shmuelie.WinRTServer;
+using Shmuelie.WinRTServer.CsWinRT;
 using System;
 using System.Threading;
-using Microsoft.CommandPalette.Extensions;
+using System.Threading.Tasks;
 
 namespace TemplateCmdPalExtension;
 
 public class Program
 {
     [MTAThread]
-    public static void Main(string[] args)
+    public static async Task Main(string[] args)
     {
         if (args.Length > 0 && args[0] == "-RegisterProcessAsComServer")
         {
-            using ExtensionServer server = new();
-            var extensionDisposedEvent = new ManualResetEvent(false);
-            var extensionInstance = new TemplateCmdPalExtension(extensionDisposedEvent);
-
+            await using global::Shmuelie.WinRTServer.ComServer server = new();
+            ManualResetEvent extensionDisposedEvent = new(false);
+            
             // We are instantiating an extension instance once above, and returning it every time the callback in RegisterExtension below is called.
             // This makes sure that only one instance of SampleExtension is alive, which is returned every time the host asks for the IExtension object.
             // If you want to instantiate a new instance each time the host asks, create the new instance inside the delegate.
-            server.RegisterExtension(() => extensionInstance);
-
+            TemplateCmdPalExtension extensionInstance = new(extensionDisposedEvent);
+            server.RegisterClass<TemplateCmdPalExtension, IExtension>(() => extensionInstance);
+            server.Start();
+            
             // This will make the main thread wait until the event is signalled by the extension class.
             // Since we have single instance of the extension object, we exit as soon as it is disposed.
             extensionDisposedEvent.WaitOne();

src/modules/cmdpal/ExtensionTemplate/TemplateCmdPalExtension/TemplateCmdPalExtension/TemplateCmdPalExtension.cs

@@ -9,9 +9,7 @@ using Microsoft.CommandPalette.Extensions;
 
 namespace TemplateCmdPalExtension;
 
-[ComVisible(true)]
 [Guid("FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF")]
-[ComDefaultInterface(typeof(IExtension))]
 public sealed partial class TemplateCmdPalExtension : IExtension, IDisposable
 {
     private readonly ManualResetEvent _extensionDisposedEvent;

src/modules/cmdpal/ExtensionTemplate/TemplateCmdPalExtension/TemplateCmdPalExtension/TemplateCmdPalExtension.csproj

@@ -43,6 +43,7 @@
     <PackageReference Include="Microsoft.WindowsAppSDK" />
     <PackageReference Include="Microsoft.Web.WebView2" />
     <PackageReference Include="System.Text.Json" />
+    <PackageReference Include="Shmuelie.WinRTServer" />
   </ItemGroup>
 
   <!--

src/modules/cmdpal/Exts/SamplePagesExtension/Pages/SampleListPage.cs

@@ -54,6 +54,11 @@ internal sealed partial class SampleListPage : ListPage
                 Title = "This item will take you to another page",
                 Subtitle = "This allows for nested lists of items",
             },
+            new ListItem(new OpenUrlCommand("https://github.com/microsoft/powertoys"))
+            {
+                Title = "Or you can go to links",
+                Subtitle = "This takes you to the PowerToys repo on GitHub",
+            },
             new ListItem(new SampleMarkdownPage())
             {
                 Title = "Items can have tags",