Adding support for middleware arguments.

[kafkiansky]

Now there is no possibility to use arguments with middleware as, for example, in Laravel.

As I imagine it, the arguments can be specified as an array within the attribute:

#[Middleware([MiddlewareA::class => ['x' => 1, 'y' => 2]])]
final class SomeController
{
}

Inside the middleware MiddlewareA arguments can be accessed using ServerRequestInterface::getAttribute() with middleware fqcn as attribute name:

final class MiddlewareA implements MiddlewareInterface
{
    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        var_dump($request->getAttribute(MiddlewareA::class)); // ['x' => 1, 'y' => 2];
    }
}

I'm also thinking of adding the ability to refer to symfony parameters with %parameter_name%.

#[Middleware([MiddlewareA::class => ['env' => '%app.env%']])]
final class SomeController
{
}

Then the arguments get to the MiddlewareA, they will be resolved.