Right now subpages are not searchable. Since we don't have the bandwidth
to implement this today, this PR adds support for having aliases users
can search for. E.g. if I search for `claude` I will see the LLM
provider subpage, whereas previously I would not see anything.


https://github.com/user-attachments/assets/25af5c5a-86d2-473b-b0dd-11141b12a089

Release Notes:

- N/A