Interactive notifications for windows

[Araxeus]

This PR adds an option to 'notifications' plugin (only on windows)

Currently looks like this:

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Could be changed to 2nd option which might be better:

Unicode: [\u{2770}-previous] [\u{25B6}-play] [\u{2771}-next]
(would need a subtle change of code since output for that play button [뿯▽] isn't the same as input for some reason)

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The same lib could be used to setup interactive notification for mac, if anyone wants to work on that - Node Notifier

• The standard pause button unicode wasn't used, because windows render those media buttons as blue

• Because of a bug with the delivery method, appID cannot be set without breaking the button functionality
  (it makes returned data equal undefined)
  so appID will it will always be the default "SnoreToast".

Misc:

This PR also changes things for both notifications (normal ones too):

• Song Icon is resized and cropped to keep original aspect ratio (resizing was really ugly with wide images before)

• Made Notification Priority menu item show only on linux (since it works only on linux)

• SongInfoProvider was parsing artist name based on video request , not on song - resulting in buggy artist names.
  changed it scrape artist name from playbar (native artist name)

  • could move functionality to notifications plugin instead of infoProvider
  • could be tweaked to wait a second on first run (first song always returns old VideoArtistName because playBar hasn't loaded by the time it queries it)

• win.once() instead of win.on fix multiple callbacks being registered

[th-ch]

Looks ok, thanks for the contribution! 2 small nits (feel free to address them), otherwise it should be good to merge!

[th-ch]

Looks good, thanks for the contribution!