feat(batch46): implement monitor endpoints — varz, connz, routez, healthz, etc.
Adds NatsServer.Monitor.cs with all monitoring endpoint implementations (Connz, Routez, Subsz, Gatewayz, Leafz, AccountStatz, Accountz, Varz, Healthz, Raftz, Expvarz, Profilez, Stacksz, IPQueuesz, Root) and updates Monitor/MonitorTypes.cs with the full set of monitoring response types.
This commit is contained in: