feat: add ability to set/remove object params (set custom_metadata)

[mikewuu]

closes #74

The error was actually due to not selecting a valid param because the cli was performing a search (not a text input).

Handled this via:

  if (paramToEdit === undefined) {
    return args.params
  }

Which basically just returns existing params gracefully instead.

This PR also adds the ability to set/remove properties on an object type param.

Screenshots

CleanShot.2024-01-23.at.12.14.06.mp4

[mikewuu]

@seveibar do we need to handle sub-properties in general? If not, I'll close this out in favor of #77

[mikewuu]

closing in favor of #77