add health check command

[dmah42]

• ae should take a network block in CIDR notation and attempt to discover healthy nodes within the network
• ae should take a list of IP addresses and attempt to discover which have healthy nodes running on them

the input should be from a configuration file or flag

the output should be either a list of healthy nodes or a list of all nodes and their health. any other information from the health endpoint response should also be included.

[dmah42]

https://pkg.go.dev/github.com/3th1nk/cidr could make this easier