docs: refine API docs for files in Command dir

[devvaannsh]

The following changes are made:-

API Documentation Cleanup: Removed all internal details from the API docs. Now, only the exports.* content is included.

DefaultMenus.js Exclusion: This file is internal, so it won’t show up in the API docs anymore.

Refactor in Menus.js: The object literals inside MenuSection are now declared separately and assigned to the MenuSection object afterward. This doesn’t affect any existing functionality. The change was made because Docusaurus had trouble parsing nested object literals when generating markdown, which caused errors.