[hail] Promote localize_entries to public & tested #5247
Numpy style guide indicates that the notes section is the appropriate place for detail on the algorithm. In particular, the types of the column and entry fields produced aren't directly related to their names, and having them in the parameter description is unintuitive. This style is also inconsistent with the rest of our documentation.
In reading the above link, I've realized that all our docs sections are out of order - the Parameters section should come first, then Returns, then Notes, then Examples. We were hoodwinked by the Sphinx example page.
I also strongly reject a warning about a possible future scaling limitation of the function that might never even exist in the life of 0.2.