Fix:(issue_1607) Allow exporting command and arguments/options to json

[dearchap]

What type of PR is this?

(REQUIRED)

• feature

What this PR does / why we need it:

(REQUIRED)

Allows us to have a starting point for a framework for exporting cli to JSON.

Which issue(s) this PR fixes:

(REQUIRED)

Fixes #1607

Special notes for your reviewer:

(fill-in or delete this section)

Testing

(fill-in or delete this section)

Added a new test case TestJSONExportCommand which shows that the entire command graph can be exported to JSON.

Release Notes

(REQUIRED)

Once a root command is constructed. json.Marshal can be used to export the command graph to a string of bytes. This can be piped to a template rendering tool such as [tpl](https://github.com/bluebrown/go-template-cli)  along with a template file to render markdown/man pages. 

[github-actions]

Note:

---

Frogbot also supports Contextual Analysis, Secret Detection, IaC and SAST Vulnerabilities Scanning. This features are included as part of the JFrog Advanced Security package, which isn't enabled on your system.

---

🐸 JFrog Frogbot