Local subscriber count in magazine info endpoint

[ismailkarsli]

Is your feature request related to a problem? Please describe.
I'm trying to add Mbin support to Lemmy Federate and the tool needs the local subscribers count in order to determine if it should sub/unsub.

Describe the solution you'd like
Add a local subscriber count field to the response of the /api/magazine/name/{magazine_name} endpoint.

[BentiGorlich]

@melroy89 I would just add property like hasLocalSubscribers instead of publishing the local subscriber counts which are also not available in the web UI.

What are you guys thinking about that?

[jwr1]

Honestly, I think it would be nice to have the actual local subscriber count. Back when that was shown instead of federated subscriber count (I don't remember if that was from Kbin or not), it was nice to be able to see what kinds of magazines were popular on the specific instance. It wouldn't have to be used in the Mbin web UI, but it could at least be used in 3rd party clients.