Configures Mopups and updates Mopups dependency

- Configures the Mopups library for popup functionality.
- Downgrades the Mopups package to a compatible version.

Author: michaelstonis

Stellar.Maui.PopUp/Stellar.Maui.PopUp.csproj

@@ -34,7 +34,7 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.Maui.Controls" Version="9.0.100" />
         <PackageReference Include="ReactiveUI" Version="21.0.1" />
-        <PackageReference Include="Mopups" Version="1.3.4" />
+        <PackageReference Include="Mopups" Version="1.3.2" />
         <PackageReference Update="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0" />
     </ItemGroup>
     <ItemGroup>

Stellar.MauiSample/MauiProgram.cs

@@ -1,6 +1,7 @@
 using System.Text;
 using CommunityToolkit.Maui;
 using Microsoft.Extensions.Logging;
+using Mopups.Hosting;
 using Stellar;
 
 namespace Stellar.MauiSample;
@@ -13,6 +14,7 @@ public static MauiApp CreateMauiApp()
             MauiApp
                 .CreateBuilder()
                 .UseMauiApp<App>()
+                .ConfigureMopups()
                 .ConfigureFonts(
                     fonts =>
                     {