Search Engine Optimization for docs

Describe your feature request

Currently it is pretty hard to find documentation on polars without navigating to the docs.

for example, searching groupby_rolling in any major search engine does not produce a link to any of the following

• python https://pola-rs.github.io/polars/py-polars/html/reference/api/polars.DataFrame.groupby_rolling.html?highlight=groupby_rolling#polars.DataFrame.groupby_rolling
• node https://pola-rs.github.io/polars/nodejs-polars/html/interfaces/dataframe.DataFrame.html#groupByRolling
• rust https://pola-rs.github.io/polars/polars/frame/struct.DataFrame.html#method.groupby_rolling

even a specific search of groupby_rolling polars does not return any links to the polars docs.

I would expect these to be the top 3 results when searching groupby_rolling polars

This is just one example, but in general discoverability will increase adoption & reduce frequently asked questions.