Open subscribe dialog when passed feed URLs via URI scheme on macOS

[einkoro]

While Raven Reader registers the URI Scheme ravenreader:// in launch services it does not appear to support opening the subscribe dialog when passed a RSS feed URL. Generally most macOS news readers will accept a feed URL and open the subscribe dialog with the URL populated if you were to, for example, open ravenreader:https://example.org/rss/feed/ with NSWorkspace.shared.open(url) or alternatively using the bundle ID to open a feed URL via NSWorkspace.shared.open([url], withAppBundleIdentifier: ...).

Would it be possible to see support for this added? Swift examples are available here but I am not sure how you go about this with electron applications: https://developer.apple.com/documentation/xcode/defining-a-custom-url-scheme-for-your-app

Additionally while it registers itself a unique URI scheme it does not register as a handler for the feed URI scheme in Launch Services so there isn't an easy way to set it as the default news reader on macOS if support was added.