Add Timestamp to JSON Output in Pipe Mode

[cwawak]

It would be helpful if macmon pipe included a timestamp in its JSON output. Right now, the output provides various system metrics like CPU temperature, memory usage, and power consumption, but there's no way to know exactly when each data point was recorded. Adding a timestamp would make it easier to correlate these metrics with other logs or time-based analysis.

I'd like to see something added like:

"timestamp": "2025-02-10T18:02:23.000Z"

to each JSON object.

This could helps with log correlation and time-series analysis and makes it easier to debug performance issues by seeing when events happened.

Thank you for considering my request! I'm not skilled at coding, but I am happy to help in any way I can.