.NET10 Migration (#946)

Runtime and build
- Move all projects to .NET 10 with SDK-style project files and a shared
  Directory.Build.props (WIN/LINUX, x86/x64 defines)
- Load managed and unmanaged dependencies from libs/managed and
  libs/unmanaged through assembly and native library resolvers
- Compile party modes with Roslyn instead of CodeDom
- Update AppVeyor to the .NET 10 SDK and dotnet test
- Download the FFmpeg and gstreamer runtimes from the dependencies
  repository during the build
- Remove the VC++ 2015-2022 runtime check, no dependency needs it anymore

Graphics and windowing
- Replace the Direct3D 9 renderer with Direct3D 11 (Vortice)
- Pace Direct3D 11 frames with a frame latency waitable swap chain
- Move window, input and message boxes to SDL3
- Replace System.Drawing with SkiaSharp and WinForms with SDL3 and a
  software renderer

Video and audio
- Replace Acinerella with FFmpeg 8.1.3 (FFmpeg.AutoGen)
- Add hardware accelerated video decoding (D3D11VA, DXVA2, VideoToolbox,
  VAAPI, VDPAU) with software fallback
- Convert YUV video frames to RGB on the GPU in Direct3D 11 and OpenGL
- Add the video options HardwareDecoding, GpuColorConversion,
  DecoderThreads and VideoDownscaleResolution
- Update OpenAL to OpenTK 4 and NAudio recording to WasapiRecorder

Fixes
- Fix the song preview start and shorten the reporter buttons
- Fix a crash when opening the highscore without a selected song
- Use the options slide highlight in the party mode screens to avoid
  brightness flicker on VRR displays
- Disable GameInput in the x86 build, SDL3 crashes in GameInputCreate
  on 32-bit systems with the GameInput runtime installed
- Fix a truncation warning in PitchTracker

VocaluxeWeb/Hosting/CWebHost.cs

@@ -21,6 +21,7 @@ using System.Net;
 using System.Security.Cryptography.X509Certificates;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Server.Kestrel.Core;
+using Microsoft.Extensions.Hosting;
 using VocaluxeWeb.Dispatching;
 using VocaluxeWeb.Remote;
 using VocaluxeWeb.Services;
@@ -32,7 +33,7 @@ namespace VocaluxeWeb.Hosting
     {
         private readonly IVocaluxeRemote _Remote;
         private readonly CWebServerOptions _Options;
-        private IWebHost _Host;
+        private IHost _Host;
         private CLiveMonitor _Monitor;
         private CQueueService _Queue;
         private bool _QueuePlaylistReady;
@@ -69,11 +70,12 @@ namespace VocaluxeWeb.Hosting
             var lanAddresses = CNetworkAddress.GetLanAddresses();
             var certificate = _Options.UseHttps ? CCertificateProvider.GetOrCreate(_Options.CertificatePath, hostName, lanAddresses) : null;
 
-            var host = new WebHostBuilder()
-                .UseKestrel(kestrel => _ConfigureKestrel(kestrel, certificate))
+            var host = new HostBuilder()
                 .UseContentRoot(AppDomain.CurrentDomain.BaseDirectory)
-                .ConfigureServices(services => CStartup.ConfigureServices(services, this, _Remote, Dispatcher, Settings, _Options))
-                .Configure(app => CStartup.Configure(app, _Options))
+                .ConfigureWebHost(web => web
+                    .UseKestrel(kestrel => _ConfigureKestrel(kestrel, certificate))
+                    .ConfigureServices(services => CStartup.ConfigureServices(services, this, _Remote, Dispatcher, Settings, _Options))
+                    .Configure(app => CStartup.Configure(app, _Options)))
                 .Build();
 
             try