Include search aliases in the docs.json file

[manishrc]

https://documents.devdocs.io/docs.json currently does not include the search aliases as defined in https://github.com/freeCodeCamp/devdocs/blob/5c82069d893bc8dce505f421c6cf05135a593c33/assets/javascripts/models/entry.js#L20-L54

https://github.com/freeCodeCamp/devdocs/blob/5c82069d893bc8dce505f421c6cf05135a593c33/lib/docs/core/doc.rb#L81-L87

Including the search aliases will help external tools integrate better with DevDocs.

Reference issue https://github.com/raycast/extensions/issues/14100#issuecomment-2298802285