Add unlimited endpoints

[marioortizmanero]

One thing I really like about tekore is that it offers endpoints without limits. Spotify has a limit of items that may be returned with certain requests, such as the followed artists or the songs in a playlist.

There are two different ways to do that with tekore AFAIK:

• scoped for a number of calls
• when initializing the client

And then the endpoints themselves are what you'd expect: followed_artists. These don't mention the "unlimited" mode, it's only tied to the client itself. The client will internally send multiple requests until the endpoint returned value is complete, and return the results.

How this could be implemented in this library could of course vary, but this feature itself is very useful and interesting.