nodes connections command needs to show if the connections have been authenticated

[tegefaulkes]

Specification

With the new network segregation changes, we can have active connections but if they're not authenticated then they can't be used. We need to indicate in the nodes connections command and the agent status command the connections that have been authenticated.

For the nodes connections command this just needs to indicate next to each connection if it has been authenticated or not. The RPC call for getting the active connections from the Polykey Agent needs to be updated to support this.

For the agent status we just need to show the number of total, authenticated and unauthenticated connections.

Additional context

Tasks

1. Update the active connections RPC call to indicate if each connection is authenticated.
2. Update the nodes connections command to show if the connections are authenticated.
3. Update the agent status command to show the number of authenticated and unauthenticated connections.

[linear]

ENG-528