feat(add): Add examples to --help output

[Janpot]

Description

Uses yargs .examples to add the examples of the readme into the CLI --help + also adds an example for the glob case

Motivation and Context

fixes #1608

How Has This Been Tested?

manually by npm link-ing and inspecting the output of lerna add --help

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

If accepted, this method of using .examples could be used in the other commands as well.
It also could be beneficial to generate the README's as to have a single source of truth.

[evocateur]

Brilliant, thanks!

[lock]

This thread has been automatically locked because there has not been any recent activity after it was closed. Please open a new issue for related bugs.