Add playlists from user's Spotify account.

[Tseshongfeeshur]

Checklist

• [X] I've checked that there is no other issue about this feature request.
• [X] This issue contains only one feature request.
• [X] The title of this issue accurately describes the feature request.

Feature description

We could add a choice to login with Spotify, and we can read user's playlist in Spotify. Btw, I love InnerTune overwhelmingly. 😋😋 (Excuse my POOR English 🥲)

Why do you want this feature?

Spotify is my primary source of songs, and most of my song list is in my Spotify account, but the InnerTune look really appeals to me! (I translate it by DeepL)

Additional information

No response