Provide a way to customize the `/questions/` path name

``` https://meta.answer.dev/questions/D1b23 ```
to
``` https://meta.answer.dev/posts/D1b23 ```

Currently I'm getting there by replacing strings in files, it would be nice if there was an official way to do this. It is perfectly suited to function as a general community, it doesn't have to be a Q&A community.

Trace how the application defines and generates the `/questions/` URL, starting with the route entry points and the string replacements described in the issue. The work is done when an official configuration changes that path to `/posts/` consistently without manual file edits.

Written by the indexing model from the issue text.