[Feature Request] Query the Metadata databases

[Sazu-bit]

Is your feature request related to a problem? Please describe.
A feature I seem to be missing is that there appears to be no way to search for manga that I might be interested. For example if I search for Isekai, I only get the local manga I have (that actually has Isekai in the title). I would like to be able to use Mango to search the various metadata databases to find content that I'd like.

Describe the solution you'd like
I'd like to be able to search for manga that I don't have using metadata such as content, genre or author.

I would like it to be structured somewhat like a Google search. So I would enter tags such as

Adventure Romance -Isekai

or

Adventure AND Mystery OR Isekai AND Adult

This would allow to search potential custom tags from various sources without having to add each tag manually.

Describe a small use-case for this feature request
This would be used to search for manga outside of the local database to seek out potentially interesting content. This would mean that users don't have to use third party apps that might not be as flexible.