Add documentation on the cli (#149)

# Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

- Add documentation for the CLI

#117

## Type of change

Please delete options that are not relevant.

- [x] New feature (non-breaking change which adds functionality)
- [x] This change requires a documentation update

# How Has This Been Tested?

Please describe the tests that you ran to verify the changes. Provide instructions so we can reproduce. Please also list any relevant details to your test configuration.

# Checklist

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that provde my fix is effective or that my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream modules

Reviewed-on: https://gitea.vylpes.xyz/RabbitLabs/random-bunny/pulls/149
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

readme.md

@@ -44,6 +44,12 @@ The json string which gets returned consists of:
 
 `sortBy` will default to 'hot' if not given or invalid
 
+## CLI
+
+Random bunny can also be used as a CLI. This is accessible via the executable (see git releases) or via `src/cli.ts`
+
+For more details, see the documentation.
+
 ## Notes
 
 * Node 4 or newer.