Self-hosted extractors: Mastodon, PeerTube and Misskey (with haruhi-dl merge)

[Lesmiscore]

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Both are intentionally checked because some code from this PR includes the code from haruhi-dl and #1505.

What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

This PR adds support for 3 self-hosted services: Mastodon, PeerTube, Misskey
Also, this replaces GabIE with MastodonIE.

supersedes #1505, #4609
cc @selfisekai

TOC

• Extractors
  • additional extractor for some instances (only Misskey)
• Instance lists
• Script to update instance list above
• some other things

TODO

• where to go: To download videos from Gab Social or Truth Social, use --ies mastodon.*,generic.
• handling of currently failing tests (because it lacks instance list that are assumed to exist in the tree)

[selfisekai]

I think the probe should first try fetching the instance's NodeInfo, which is a standard used in all of these services (and more of fediverse, see the standard's webpage; excluding Gab, for unknown to me reason, but it's not really a selfhosted service and it's always on the instance list) and allows to just see the software name and supported features

[Lesmiscore]

Fallback instance lists will now have required ones for passing tests

[Chocobozzz]

Any news on this PR? :)

PeerTube relies heavily on yt-dlp to import remote channels/videos/playlists. It would be nice if the software could automatically detect a peertube, as we are limited for now by the URLs list written directly in the code.

[selfisekai]

ugh, afaik the PR author is in jail, lmao