Add all lib-multisrc

[nomaxsnx]

Describe your suggested feature

Some scanlators are changing the theme to: "Peach", as I don't know if there is support to correct some errors, I will leave an example like "keiyoushi".

https://github.com/keiyoushi/extensions-source/tree/main/lib-multisrc it's good to add all the theme support there is.

https://github.com/keiyoushi/extensions-source/tree/main/lib-multisrc/peachscan support for adding PeachScan

Other details

No response

Acknowledgements

• [X] I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.