CLI: use StatusResponse.as_dict() in JSON command

[PerchunPak]

No description provided.

[PerchunPak]

I don't really consider adding new fields to JSON as a breaking change, but we can postpone this PR until v13

[ItsDrike]

Hm, I'm not sure, I mean, it depends on how people are using this output, it could be breaking (if used with some kind of strict parsing into specific fields, where all have to be consumed), or it might not be (more likely).

The change of port from str to int might also be breaking.

I don't know how we should treat these kind of changes in the CLI. I think most people that rely on the kind of consumption where this would be breaking are likely using mcstatus as a library, rather than calling it via CLI, and generally, I think most people that are using it as CLI are doing so from simple bash scripts where these changes very likely wouldn't be braking, so I don't think it'd be particularly wrong to release this without a braking change. Though I also wouldn't mind postponing until the next major release.

[PerchunPak]

I'd like to postpone it after all, this is purely an internal QOL change