Add basic controls taskbar icon

[ffes]

Other music players (like Spotify) add basic Previous - Play/pause - Next controls to the taskbar icon. Would be great to have that as well.

[torum]

I'm really really sorry for the late replay. It's been forever. It is now done. I really appreciate your input.

[torum]

I reopened this issue because, as you may have noticed, I updated MPDCtrl from WPF to WinUI3. As a result, the taskbar media control is gone for now. It is because WinUI3 still lacks the feature (TaskbarItemInfo).

microsoft/microsoft-ui-xaml#5211

So, when Microsoft implements TaskbarItemInfo in WinUI3, I'll definitely add this feature to MPDCtrl. Until then, this issue remains open.

[Anthonyy232]

@Notam implemented this in my app, if anyone is curious on how to work around WinUI 3 not supporting this. They originally implemented the icons itself in XAML, I moved it to Win2D but if you don't want the dependency, their commit should show how to do so.

Anthonyy232/Nagi#47