chg: adopt ps_everywhere analyzer to use JSONL format

[Roman-Envoid]

This merge request updates the ps_everywhere analyzer to output data in JSONL format instead of standard JSON.

Key Changes:

1. Modified the ps_everywhere analyzer to produce JSONL output instead of a single JSON array.
2. Updated and extended serialization logic to store additional datetime, source and timestamp fields.
3. Added doc-strings for each method.

Sample of output data:

{"process": "/sbin/launchd", "timestamp": 1734540943.0, "datetime": "2024-12-18T18:55:43.000000+02:00", "source": "ps.txt"}
{"process": "/usr/libexec/UserEventAgent (System)", "timestamp": 1734540943.0, "datetime": "2024-12-18T18:55:43.000000+02:00", "source": "ps.txt"}
{"process": "/usr/libexec/logd", "timestamp": 1734540943.0, "datetime": "2024-12-18T18:55:43.000000+02:00", "source": "ps.txt"}
{"process": "/usr/libexec/runningboardd", "timestamp": 1734540943.0, "datetime": "2024-12-18T18:55:43.000000+02:00", "source": "ps.txt"}