Repeat energy measurement requests a maximum number of times with a --retries flag

[zimeg]

Summary

Infinite retries to find a certain sureness score might not be the ideal behavior of this command. Sometimes exiting sooner with the best measurement is better.

$ etime -r 4 sleep 12
       12.02 real         0.00 user         0.00 sys
     1010.98 joules      83.98 watts       64.2% sure

Possible workarounds

Hope that a good sureness score is found quickly! Or interrupt the command and carry on if that's alright.

[zimeg]

This can close #38 if a default is set 👀 Might have to consider the sureness score - if each response has all zeros that might be an alright sign 🪧