Support likes and retweets endpoints.

[SamHames]

This will add support for the newly useful like and retweets endpoints, that now allow retrieving all of the likes and retweets of a specific tweet, or retrieve a specific users likes.

This implementation uses the Twitter API naming of these functions (ie what's in the URLs) for consistency.

• Add client methods to support the new endpoints
• Add basic CLI layer support
• Do some targeted testing of the CLI layer/some investigation of the results.
• Documentation - this will especially need to capture that the liking_users and retweeted_by return user profiles. In the latter case this is also a shame because it doesn't give the time information of the retweet.

closes #403 (kind of?)
closes #466

[SamHames]

Also, is it just me, or does nothing in the API show how many tweets a user has liked? It's visible in the web view of a profile, but apparently it's not the public_metrics field?

[SamHames]

Okay, I've done some more testing (and had someone else do some experimentation) and added some more explanatory docs, should be ready to merge if everyone else is happy?

[edsu]

This looks awesome @SamHames. One thing I've noticed is that we've started to have some inconsistency between snake_case and kebab-case in the cli. I would prefer if we use kebab -- any objections?

[edsu]

This looks good! I just adjusted the cli and docs to use kebab-case.

[igorbrigadir]

This is great! Thanks again!