Implement Navidrome sharing (#575)

* add share item feature

* take care of (mostly) everything

* bugfixes

* allow clicking on notification to open url

* readd the missing modal after router migration

* remove unnecessary extension

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Co-authored-by: Kendall Garner <17521368+kgarner7@users.noreply.github.com>

src/renderer/features/context-menu/events.ts

@@ -28,6 +28,7 @@ export type ContextMenuItemType =
     | 'addToFavorites'
     | 'removeFromFavorites'
     | 'setRating'
+    | 'shareItem'
     | 'deletePlaylist'
     | 'createPlaylist'
     | 'moveToBottomOfQueue'