Add script to generate CLI structure

[SferaDev]

Add script to generate the structure of the CLI for calling it programmatically and validating params. It will also be useful to generate documentation for pgroll.com.

[andrew-farries]

This looks great; thanks for doing it 🙏

To merge I think we also need:

• A Makefile rule to generate cli-definition.json
• Invoke the Makefile rule from CI and fail the build if cli-definition.json is out of sync.

[SferaDev]

Suggested change

	Use: "sql <sql statement>",
	Use: "sql <statement>",

[SferaDev]

@andrew-farries Added it to the generate rule, let me know if that works or we should have a different one for this

[andrew-farries]

@andrew-farries Added it to the generate rule, let me know if that works or we should have a different one for this

That works for me.