[Feature] Add z-library and Library Genesis support

[tock-dev]

Platform

Applicable to all platforms

Linux Distribution (if applicable)

No response

Why is this feature needed?

Unfortunately Anna's doesn't have some books but lgli has almost all books, and z-lib does too.

Feature Description

Add 3 checkboxes in the setting to allow finding & downloading books from Anna's, z-lib and lgli.

Alternatives Considered

No response

Additional Context/Screenshots

No response

Checklist

• I have searched existing issues for similar feature requests.