CLI command to download code components

Overview

The CLI tool needs to be able to download code components into a local codebase. This means fetching their data from the /api/v0/config/js_component endpoint, and writing it to files.

→ See: #3525571: [Meta] CLI tool for code components

Proposed resolution

1. Implement this command using the implementation as a reference from the POC: https://github.com/lauriii/experience-builder-cli/blob/main/src/commands.... Use @clack/prompts.
2. Read the location for your local directory for components from an environment variable or .env file established in #3525579: Implement client credentials flow in CLI, centralize managing config.
3. Component format:
   

   my-component/
     ├── component.yml     # Component metadata and configuration
     ├── index.jsx         # React component source
     ├── index.css         # Optional CSS
   

   The component.yml file can match the shape of the data the /api/v0/config/js_component endpoint works with — excluding the JS and CSS source/compiled code.

4. Allow users to select components interactively or passed as a CLI argument. Make sure there is an option to select all.
5. Create the directories and files for all selected components.
6. Override any directories locally with matching names to a component that's downloaded.
7. Download the CSS source from the global asset library (/api/v0/config/xb_asset_library/global), create it as global.css in the local folder for components. Override it any time any component is downloaded.