Add CNM functionality to Block Explorer

[RitaMAllenCA]

Work with @rob-casper on this SRE wrote a handy tool called CNM for their own telemetry but it turned out to be very useful to engineers. As such, the developers found it critical to getting mainnet and subsequent releases out the door and it is likely that other chain operators will also find it useful. We should add it to the Block Explorer.

During Grooming - add the steps it would take to integrate CNM into the current block explorer framework, including e-e testing and CI/CD. May want to make it an epic.....

There will be a need for design and middleware updates