Mangal Integration

[hillmanation]

Integrate Mangal into the bot for use with querying manga/manga info outside of what is on the Kavita server.

[hillmanation]

Mangal seems to be the best option for a cli capable multisource manga lookup/download tool unfortunately it's written in Go and not python so implementing it into commands and such will be a chore but it's updated regularly and is robust and can be leveraged for some download tasks. The goal of this initial integration is for inline cli lookups, as mentioned above since it can query mangadex.org