Support autofix where possible

[jenseng]

Not everything is auto-fixable, but it would be nice to support it for at least the following rules:

• use-link-for-routes - switch to remix equivalents
  • <a> -> <Link>
  • <form> -> <Form reloadDocument>
• no-relative-paths - make the paths absolute
• no-urls - switch to native elements, normalizing/removing attributes as necessary
  • <Link> / <NavLink> -> <a>
  • <Form> (and <fetcher.Form>) -> <form>