Laravel Version

12.14.1

PHP Version

8.4.7

Database Driver & Version

No response

Description

The Uri helper cannot be "fluently modified" (as shown in the docs) when starting with a relative url (path only)

This will return errors due to the fluent changes happening one at a time, all resulting in invalid states. (Although adding a Host to a Uri with just path should result in a valid state).

Steps To Reproduce

1. Open Laravel Tinker (sail tinker / php artisan tinker)
2. Run the following:

use Illuminate\Support\Uri;

$uri = Uri::of('relative/path/to/resource');

dump($uri);  /* Viewing contents of current URI */

/* 
 * Scheme first, Host second:
 *   League\Uri\Exceptions\SyntaxError: The uri `https:relative/path/to/resource` is invalid for the `https` scheme. 
 */
$uri->withScheme('https')->withHost('example.com')->withPath('/other/path/to/resource');

/* 
 * Alternatively, Host first, Scheme second:
 *   League\Uri\Exceptions\SyntaxError: If an authority is present the path must be empty or start with a `/`.
 */
$uri->withHost('example.com')->withScheme('https')->withPath('/other/path/to/resource');

Now if this is not supported that's fine, but it is very unintuitive as you can create (and work with other parts of) the created Uri when only supplying a relative URL.