ui: migrate client back to WinForms

-> let's use wine for comatibility again
-> easier to maintain
-> easier to build dynamic options with

ModpackUpdater.Apps/ModpackUpdater.Apps.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
@@ -12,6 +12,9 @@
 
   <ItemGroup>
     <PackageReference Include="Pilz.UI" Version="3.0.0" />
+    <PackageReference Include="Pilz.UI.WinForms.Telerik.Symbols" Version="1.2.1" />
+    <PackageReference Include="UI.for.WinForms.Common" Version="2025.2.612-preview" />
+    <PackageReference Include="UI.for.WinForms.Themes" Version="2025.2.612-preview" />
   </ItemGroup>
 
 </Project>