Windows dll files for yauiclient v2

sdl2 https://www.libsdl.org/license.php
libcpr https://github.com/libcpr/cpr/blob/master/LICENSE
libcurl https://curl.se/docs/copyright.html
libmpv https://github.com/mpv-player/mpv/blob/master/Copyright
FFmpeg 6 https://ffmpeg.org/legal.html
nholmman:;json https://github.com/nlohmann/json/blob/develop/LICENSE.MIT