Add library specific search

[aoba-seragakii]

Describe your suggested feature

Basically a booru-styled search
This is a feature present on Suwayomi with the VUI web client. It's basically a PC version of mihon
The dev for this web client has added a help button to specify how it works
It may help on this feature's development

Other details

No response

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open or closed issue.
• I have written a short but informative title.
• If this is an issue with an official extension, I should be opening an issue in the extensions repository.
• I have updated the app to version 1.12.1.
• I will fill out all of the requested information in this form.