I'm trying to develop a Safari app extension and want to enable a persistent background page for it. I could find examples of how to enable it for Web extensions using manifest.json, but for App Extension it seems that I need to use Info.plist and I couldn't find any documentation on it. How can I use the background page?

I am not enrolled in the Apple developer program and need to create a small Safari app extension helper that will be shared with my colleagues within the company. Is it somehow possible for me to distribute the app in some way without forcing everyone to disable a gatekeeper?