CLI command to add tracks to a playlist

[BenGale93]

Is your feature already implemented in the latest master?

Not that I'm aware of.

Is your feature request related to a problem? Please describe.

I'd like to be able to quickly run a command in the CLI to add the current track to my main playlist. This is to reduce the amount of context switching I need to do when I decide I like the song.

Describe the solution you'd like

I have a very rough solution here: b7bfa96

Additional context

The solution I have implemented messes with the current API quite badly, specifically passing state into the playlist command. Also, if you run the CLI command whilst the TUI player is open in another terminal the command will just hang and I'm not sure why.

Let me know if you are happy with this feature being included and I'll open a PR we can collaborate on.

[BenGale93]

Managed to fix the CLI hanging issue by spawning a thread: master...BenGale93:spotify-player:feat/add-to-playlist

Code is pretty hideous though. Will continue to work on that.

[Sylvexn]

Adding to this:
Creating a shortcut for adding to Liked Songs as a hotkey as well as adding to specified playlist would be nice.