rustdoc searches don't find all relevant classes  #6648

Describe the bug

Something is wrong with the searching function on doc.rs for datafusion.

To Reproduce

Specifically, when one searches for SqlToRel like this: https://docs.rs/datafusion/26.0.0/datafusion/?search=sqltorel

Nothing comes up:

Expected behavior

However, it is definitely documented in https://docs.rs/datafusion-sql/26.0.0/datafusion_sql/planner/struct.SqlToRel.html

(though note that is a different crate, datafusion_sql not datafusion

Additional context

@dadepo reported this on slack

I think it is a function of the fact that datafusion is broken into several different crates and unless an item like SqlToRel is re-imported into datafusion directly it doesn't show up in the rustdocs

I believe arrow-rs uses pub use submodule::* extensively to work around this problem, for example:

https://docs.rs/arrow/latest/src/arrow/compute/mod.rs.html#18-38