On the navigation, instead of

built-in operations

sources

1. Make it

built-in sources

as top level

Steps:

1. Create sources folder
2. Make index.md that copies from existing ops/sources
3. In sidebar, make

leave items empty for now

 { type: 'category', label: 'Built-in Sources', link: { type: 'doc', id: 'sources/index' }, collapsed: true, items: [ ], }, 

4. set up redirects: check docs/docusaurus.config.ts
   {
   from: '/ops/sources',
   to: '/sources',
   },