process uptime

[thijstriemstra]

Is your feature request related to a problem? Please describe

i would like to know how long moonraker and klipper have been running, eg uptime in form of unix timestamp or datetime.datetime

Describe the solution you'd like

an api that provides uptime for a process managed by moonraker.

Describe alternatives you've considered

fluidd ticket: fluidd-core/fluidd#1282

Additional information

No response