Add Omnivore

[abers]

Preflight Checklist

• I agree to follow the Code of Conduct that Ferdium Recipes adheres to.
• I have searched the issue tracker for a recipe request that matches the one I want to file, without success.

Name of the service

Omnivore

URL of the service

https://omnivore.app

GitHub URL to a recipe that has already been created by someone else or you

No response

Features you want implemented

"Continue with Google" login support. When added as "Custom Website", clicking to log in with Google opens a blank tab in the default browser.

[Akasiek]

It is quite tricky. There is a Google iframe that generates and opens a popup.

When I click on it in Ferdium, it throws an error with the popup URL and opens an iframe button URL, which is kinda unusual... That's why we get the empty tab - it's just the button page that can't be opened with the GET method.

Should probably catch the popup URL from the error message and open it instead.