[Feature Request] Add 'show' command to the keystore CLI

[spapadop]

Is your feature request related to a problem? Please describe

There is no "show" command option on "opensearch-keystore" CLI tool. It would be helpful for debugging purposes.

Describe the solution you'd like

Add an "opensearch-keystore show" command that displays the value of a single setting from the keystore.

Related component

Other

Describe alternatives you've considered

No response

Additional context

No response

[dblock]

Thanks @spapadop. Want to give it a shot?

[peternied]

[Triage - attendees 1 2 3 4 5 6 7 8] @spapadop Thanks for creating this issue, we'd welcome a pull request for this feature.