.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

HowToBuildLinux.md

@@ -4,26 +4,19 @@ Runing Vocaluxe on Linux is not offically supported yet -but you can try it your
 (the problematic part is fullfilling the runtime dependencies)
 
 
-* Install ffmpeg 3.2 (a quick and dirty compile script can be found here: [installFFmpeg.sh](https://github.com/lukeIam/Vocaluxe/blob/travis/.travis/installFFmpeg.sh) )
-* Get sure your gcc and g++ version is >= 4.8
-* Install at least mono 5.8.0 ([HowTo install mono](http://www.mono-project.com/download/stable/))
-* Clone the repository
-You want to use this branch as it contains some linux specific changes   
-(compiles on Ubuntu 14.04): [travis@lukeIam/Vocaluxe](https://github.com/lukeIam/Vocaluxe/tree/travis)
-* Navigate to the travis branch and execute (commands from [.travis.yml](https://github.com/lukeIam/Vocaluxe/blob/travis/.travis.yml)):
+* Install the [.NET 10 SDK](https://dotnet.microsoft.com/download/dotnet/10.0)
+* Get sure gcc, g++, make and pkg-config are installed
+* Install the runtime dependencies:
+  - FFmpeg 8 (libavformat 62, libavcodec 62, libavutil 60, libswscale 9, libswresample 6)
+  - portaudio
+  - hidapi (libhidapi-libusb)
+  - openal (optional, only needed for the OpenAL playback)
+  - gstreamer 1.0 (optional, only needed for the GStreamer playback)
+* Clone the repository and execute in its folder:
 ```bash
 chmod ugo+x ./.build/linuxPostBuildEvent.sh
 chmod ugo+x ./.build/linuxPreBuildEvent.sh
-chmod ugo+x ./.travis/gitDescribe.sh
-wget https://dist.nuget.org/win-x86-commandline/latest/nuget.exe -P ./.travis/
-
-config=Linux platform=x64
-
-# ./.travis/gitDescribe.sh
-mono ./.travis/nuget.exe restore
-make -C PitchTracker
-make -C Vocaluxe/Lib/Video/Acinerella
-msbuild /p:Configuration=Release$config /p:Platform=$platform /p:TargetFrameworkVersion=v4.7 Vocaluxe.sln
+make
 ```
 * The build should complete without errors
 * change to the Output directory:
@@ -32,15 +25,8 @@ cd Output
 ```
 * Start Vocaluxe:
 ```bash
-mono Vocaluxe.exe
+./Vocaluxe
 ```
-* Vocaluxe will start (you will see the splash screen) and then crash because runtime dependencies are missing    
-Required dependencies (by heart - can be incorrect and incomplete):  
-  - gstreamer 1.0
-  - ffmpeg 3.2 (maybe we can use the build script which builds the libs at the moment)
-  - hidapi
-  - libgstreamersharpglue-1.0.0
-  - portaudio
-  - ?
+* If GStreamer is not installed, set `PlayBackLib` to `PortAudio` in the `Config.xml`
   
   * If yo make some progress we would be happy if you share it with us in a pull request/issue.