Make default player in Windows

Firstly, thank you very much for such a powerful music player! Added it to the site about free software, here is the [link](https://xn--90abhbolvbbfgb9aje4m.xn--p1ai/%D0%BC%D1%83%D0%BB%D1%8C%D1%82%D0%B8%D0%BC%D0%B5%D0%B4%D0%B8%D0%B0/%D0%B2%D0%BE%D1%81%D0%BF%D1%80%D0%BE%D0%B8%D0%B7%D0%B2%D0%B5%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5/xr3player-javafx.html).

Secondly, you can’t add to it the ability to make it the default player? I know perfectly well how to do this manually, but some category of users will constantly ask, so it would be nice to add this feature to it.

The issue names no files, tests, or entry points. Start by locating the JavaFX application entry point and researching how Windows registers default media players; completion should be defined as a supported way to make XR3Player the default player on Windows.

Written by the indexing model from the issue text.