fix(cli): -h/--help not working

[SizzleUnrlsd]

The CLI help flags -h and --help do not work as expected. Users cannot display usage information reliably, which impacts basic discoverability and usability.

Expected behavior

•	Running <tool> -h or <tool> --help prints the help/usage output to stdout and exits with code 0.
•	Help is displayed without requiring any other arguments.
•	Help output is consistent and includes:
•	Short description
•	Usage line(s)
•	Options list (including -h, --help)
•	Examples (if applicable)

Actual behavior

•	-h/--help does not display help and/or returns an error / non-zero exit code / continues execution / triggers argument parsing failure.

Steps to reproduce

1.	Run: <tool> -h
2.	Run: <tool> --help
3.	Observe behavior.

Notes / hypothesis (optional)

•	Help flags may not be registered in the argument parser, or they are being overridden by a custom parsing routine.
•	In some CLI parsers, -h/--help is disabled by default (or conflicts with subcommands) unless explicitly enabled.

Acceptance criteria

•	-h and --help always print help and exit 0.
•	Help works for:
•	root command
•	each subcommand (if any): <tool> <subcmd> -h
•	No regression on existing argument validation.
•	Add a minimal test (if tests exist) asserting help behavior and exit code.

Labels

•	bug
•	cli
•	priority:high (optionnel)