Allow for custom profile urls

Right now, if you have a multiuser site, users get /author/username as per WordPress.

Wondering if the plugin should create a custom url scheme, such as /user or such. I think author is fine but wanted to raise the question

The issue names no files, tests, or entry points and only raises whether WordPress author URLs should be replaced. First clarify the desired URL scheme and compatibility expectations, then locate how the plugin handles WordPress profile URLs. Done requires an agreed URL design and an implementation plan before coding can begin.

Written by the indexing model from the issue text.