Update project to Microsoft Testing Platform and implement new tests

Co-authored-by: christiannagel <1908285+christiannagel@users.noreply.github.com>

Author: Copilot

src/clients/Codebreaker.GameAPIs.Client.Tests/Codebreaker.GameAPIs.Client.Tests.csproj

@@ -7,13 +7,15 @@
 
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
+    <EnableMicrosoftTestingPlatformLatest>true</EnableMicrosoftTestingPlatformLatest>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Testing.Platform" Version="1.1.0" />
+    <PackageReference Include="Microsoft.Testing.Extensions.TrxReport" Version="1.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit" Version="3.2.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
@@ -22,6 +24,15 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
+    <PackageReference Include="xunit.analyzers" Version="1.11.0" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)'=='net8.0'">
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="8.0.0" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)'=='net9.0'">
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.0" />
   </ItemGroup>
 
   <ItemGroup>

src/clients/Codebreaker.GameAPIs.Client.Tests/GlobalUsings.cs

@@ -5,5 +5,7 @@
 global using Moq.Protected;
 
 global using System.Net;
+global using System.Text.Json;
 
 global using Xunit;
+global using Xunit.Abstractions;