[twitter] Add support for unretweet and post/comment deletion

[MrPetovan]

Closes friendica/friendica#11022

Also:

• Improve probe_detect hook function
• Add item_by_link hook function

Remaining caveat: Comments posted on Twitter and imported in Friendica do not trigger any Notifier task, possibly because they are private to the user and don't require any remote deletion notifications sent. Comments posted on Friendica and mirrored on Twitter trigger the Notifier task and the Twitter counter-part will be deleted accordingly.

Depends on friendica/friendica#11025 for the hook part.

[MrPetovan]

@annando Some checks don't seem to make sense in twitter_post_hook, like the checks on the pconfig twitter.import value in a hook meant to post data to Twitter. On the contrary we don't check the pcfonfig twitter.post value in the same hook function even though it is meant to control posting to Twitter.

[nupplaphil]

@MrPetovan shall I wait for @annando 's Feedback

[annando]

That check for "import" is meant for the special handling of imported Twitter posts, I guess. So when we are not importing Tweets then we are stopping here. You can see here the origin: https://github.com/friendica/friendica-addons/pull/157/files

[MrPetovan]

Why are we stopping a process meant to export content to Twitter with the import config?

[MrPetovan]

@MrPetovan shall I wait for @annando 's Feedback

No, my question is tangential to the original task.