[feat] Number of total plus dead, asleep, and awake nodes in control panel

[robertsLando]

Discussed in https://github.com/zwave-js/zwavejs2mqtt/discussions/1560

^{Originally posted by jhein05 August 11, 2021} Seeing the total number of nodes and the number of dead, asleep, and awake nodes in the header of the control panel could be a helpful things to see the overall status of your Z-Wave network faster.