`parse` returns `ParseError`, but not part of api

https://docs.rs/surf/latest/surf/struct.Url.html#method.parse

`parse` returns `ParseError`, but not part of API (part of crate `url`)

might be good to re-export or expose it somehow

Start with the surf::Url::parse documentation linked in the issue and inspect how its ParseError type is exposed. Done means users can access the returned error through surf's public API, with the resulting API documentation making that type available.

Written by the indexing model from the issue text.