Idea: Custom scrappers support

[otomay]

Something like mangal custom scrappers.

Some scans that translates mangas that I read didn't publish they work on big websites like mangadex. They have their own website.

[dokkaner]

More than that, I'm going to document the "Agents" / Scrappers so that it's easier to add them for anyone that want expand it.

For the record, the existing ones can be found here and follow the same model:
Teemii Agents