Changes to support app-silo; requires app-silo to be applied despite TargetDeviceFaimly not matching magic versions

Author: JohnMcPMS

src/AppInstallerCLIPackage/Package.appxmanifest

@@ -4,10 +4,11 @@
   xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
   xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3"
   xmlns:uap5="http://schemas.microsoft.com/appx/manifest/uap/windows10/5"
+  xmlns:uap18="http://schemas.microsoft.com/appx/manifest/uap/windows10/18"
   xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
   xmlns:com="http://schemas.microsoft.com/appx/manifest/com/windows10"
   xmlns:desktop6="http://schemas.microsoft.com/appx/manifest/desktop/windows10/6"
-  IgnorableNamespaces="uap uap3 uap5 rescap">
+  IgnorableNamespaces="uap uap3 uap5 uap18 rescap">
   <Identity Name="WinGetDevCLI" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" Version="0.0.2.0" />
   <Properties>
     <DisplayName>WinGet Dev CLI</DisplayName>
@@ -97,7 +98,7 @@
         </com:Extension>
       </Extensions>
     </Application>
-    <Application Id="WinGetMCPServer" Executable="DotNet\WinGetMCPServer.exe" EntryPoint="Windows.FullTrustApplication">
+    <Application Id="WinGetMCPServer" Executable="DotNet\WinGetMCPServer.exe" EntryPoint="Windows.FullTrustApplication" uap18:EntryPoint="Isolated.App" uap18:TrustLevel="appContainer" uap18:RuntimeBehavior="appSilo">
       <uap:VisualElements DisplayName="WinGet Dev MCP Server" Square150x150Logo="Images\MedTile.png" Square44x44Logo="Images\AppList.png" Description="The WinGet MCP server." BackgroundColor="#0078d7" AppListEntry="none" >
         <uap:DefaultTile/>
       </uap:VisualElements >

src/WinGetMCPServer/Program.cs

@@ -6,6 +6,7 @@
 
 namespace WinGetMCPServer
 {
+    using Microsoft.Extensions.Configuration;
     using Microsoft.Extensions.DependencyInjection;
     using Microsoft.Extensions.Hosting;
     using Microsoft.Extensions.Logging;
@@ -17,7 +18,13 @@ internal class Program
 
         static void Main(string[] args)
         {
-            var builder = Host.CreateApplicationBuilder();
+            // Set the content root to our package location
+            HostApplicationBuilderSettings settings = new HostApplicationBuilderSettings { Configuration = new ConfigurationManager() };
+            string contentRootPath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "MCP");
+            Directory.CreateDirectory(contentRootPath);
+            settings.Configuration[HostDefaults.ContentRootKey] = contentRootPath;
+
+            var builder = Host.CreateApplicationBuilder(settings);
             builder.Logging.AddConsole(consoleOptions => { consoleOptions.LogToStandardErrorThreshold = LogLevel.Trace; });
 
             builder.Services