List orb registry categories

## Usage

`circleci orb list-categories [flags]`

## Flags

| Flag          | Description                                                                       |
| ------------- | --------------------------------------------------------------------------------- |
| `--jq string` | Process values from the response using jq syntax (see `circleci help formatting`) |
| `--json`      | Output as JSON                                                                    |

Global flags: `-c, --config`, `--debug`, `--no-color`, `-q, --quiet` — see `circleci --help`.

## Examples

- List all orb categories: 
  `circleci orb list-categories`
- Output as JSON: 
  `circleci orb list-categories --json`
- Capture category names only: 
  `circleci orb list-categories --json --jq '.[].name'`

## Details

List all categories available in the CircleCI orb registry.

Categories are used to organize and discover orbs. Use
'circleci orb add-to-category' to categorize your orbs.

JSON fields: id, name

