Remove Uri from responders - replace with String

[skwee357]

This is a PR for #31

I have decided to leave HxCurrentUrl with Uri dependency, as this is aligned with how axum extracts the current Uri. I have removed Uri dependency from all Url/Location headers.

For more information, see hyper Uri does not support #fragment

Changes

• Replace Uri with String for HxLocation responder
• Replace Uri with String for HxPushUrl responder
• Replace Uri with String for HxRedirect responder
• Replace Uri with String for HxReplaceUrl responder