* feat: add JSON output tests and README docs for analyze and status
Add 7 BATS tests covering `--json` output for `mo analyze` and `mo status`:
- schema structure
- field types
- pipe auto-detection.
Also document the `--json` flag in a new "Machine-Readable Output" README section, including the auto-detection behavior when piped.
* chore: use waitgroup go in status collector
---------
Co-authored-by: Tw93 <hitw93@gmail.com>