[CLI Feature] Client status, show transaction rate and pool stats

It would be motivating to see the transactions per second (perhaps over a 24 hour sliding window) for the entire network.

It would also useful to see the number of transactions pending in the pool.

coda client status

Coda Daemon Status 

Global Number of Accounts:                     18
The Total Number of Blocks in the Blockchain:  1
Local Uptime:                                  36s
Transactions per second (24hr):                3.14
Pool size:                                     271

This would be helpful for monitoring and debugging to see what’s the current “demand” and whether the network is keeping up.

discord: jspadave