Add UWP project and remove Xamarin.Forms support

Introduced a new UWP project (`Caliburn.Micro.UWP`) with modern .NET features, including nullable reference types and AOT compatibility. Added a corresponding UWP test project.

Removed Xamarin.Forms projects and all associated Android, iOS, and shared files, indicating a migration away from Xamarin.Forms. Updated the solution file to reflect these changes.

Updated package versions for `System.Reactive`, `Autofac`, `FSharp.Core`, and others. Improved asynchronous handling in `App.xaml.cs`. Removed `global.json` to simplify SDK version management.

Refactored the codebase to remove Xamarin.Forms-specific logic and dependencies, focusing on UWP, WinUI, Avalonia, and MAUI platforms.

Author: vb2ae

samples/features/Features.Avalonia/Features.Avalonia.csproj

@@ -23,7 +23,7 @@
 
     <PackageReference Include="Avalonia.Themes.FLuent" Version="11.3.5" />
     <PackageReference Include="MessageBox.Avalonia" Version="3.2.0" />
-    <PackageReference Include="System.Reactive" Version="6.0.1" />
+    <PackageReference Include="System.Reactive" Version="6.1.0" />
     <PackageReference Include="Xaml.Behaviors.Avalonia" Version="11.3.2" />
     <PackageReference Include="Xaml.Behaviors.Interactivity" Version="11.3.2" />
     <PackageReference Include="XamlNameReferenceGenerator" Version="1.6.1" />

samples/features/Features.UWP/Features.UWP.csproj

@@ -11,7 +11,7 @@
     <AssemblyName>Features.CrossPlatform</AssemblyName>
     <DefaultLanguage>en-US</DefaultLanguage>
     <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
-    <TargetPlatformVersion>10.0.19041.0</TargetPlatformVersion>
+    <TargetPlatformVersion>10.0.22621.0</TargetPlatformVersion>
     <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>

samples/scenarios/Scenario.Autofac/App.xaml.cs

@@ -1,8 +1,9 @@
 using System;
 using System.Collections.Generic;
-using Windows.ApplicationModel.Activation;
+using System.Threading.Tasks;
 using Autofac;
 using Scenario.Autofac.ViewModels;
+using Windows.ApplicationModel.Activation;
 
 namespace Scenario.Autofac
 {
@@ -26,7 +27,8 @@ protected override void Configure()
 
         protected override void OnLaunched(LaunchActivatedEventArgs args)
         {
-            DisplayRootViewForAsync<ShellViewModel>();
+            var displayStartPage = Task.Run(async () => await DisplayRootViewForAsync<ShellViewModel>());
+            displayStartPage.Wait();
         }
 
         protected override object GetInstance(Type service, string key)

samples/scenarios/Scenario.Autofac/Scenario.Autofac.csproj

@@ -11,7 +11,7 @@
     <AssemblyName>Scenario.Autofac</AssemblyName>
     <DefaultLanguage>en-US</DefaultLanguage>
     <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
-    <TargetPlatformVersion>10.0.19041.0</TargetPlatformVersion>
+    <TargetPlatformVersion>10.0.22621.0</TargetPlatformVersion>
     <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>
@@ -127,7 +127,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Autofac">
-      <Version>8.1.1</Version>
+      <Version>9.0.0</Version>
     </PackageReference>
     <Reference Include="Caliburn.Micro.Core, Version=4.0.0.0, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>

samples/scenarios/Scenario.Functional.App/Scenario.Functional.App.csproj

@@ -63,8 +63,8 @@
     <Reference Include="Caliburn.Micro.Platform.Core">
       <HintPath>..\..\..\bin\Caliburn.Micro.Platform\release\net462\Caliburn.Micro.Platform.Core.dll</HintPath>
     </Reference>
-    <Reference Include="FSharp.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\FSharp.Core.8.0.401\lib\netstandard2.0\FSharp.Core.dll</HintPath>
+    <Reference Include="FSharp.Core, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\FSharp.Core.10.0.100\lib\netstandard2.0\FSharp.Core.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />

samples/scenarios/Scenario.Functional.App/packages.config

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="FSharp.Core" version="8.0.401" targetFramework="net48" />
+  <package id="FSharp.Core" version="10.0.100" targetFramework="net48" />
 </packages>

samples/scenarios/Scenario.Functional/Scenario.Functional.fsproj

@@ -15,4 +15,8 @@
       <HintPath>..\..\..\bin\Caliburn.Micro.Platform\release\net462\Caliburn.Micro.Core.dll</HintPath>
     </Reference>
   </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Update="FSharp.Core" Version="10.0.100" />
+  </ItemGroup>
 </Project>