[12.x] Pass ReflectionParameter to attribute resolving

[chriskapp]

For custom Attributes using ContextualAttribute it can be sometimes useful to access the ReflectionParameter i.e. to get the name or type-hint. This PR simply passes the ReflectionParameter to the static resolve method so that it can be used.

In this PR I have also adjusted the RouteParameter making the parameter optional and if not provided we simply use the name of the parameter, which simplifies a little bit the usage since often the name of the variable is identical to the parameter name.

Before:

public function show(#[RouteParameter('id')] string $id): View

After:

public function show(#[RouteParameter] string $id): View

The static resolve callback method accepts now the ReflectionParameter as third argument:

Before:

public static function resolve(self $attribute, Container $container)

After:

public static function resolve(self $attribute, Container $container, ReflectionParameter $parameter)

Since we only add a new parameter it should be no breaking change for any existing code. New code simply can add the parameter if needed.

[github-actions]

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[antonkomarev]

Since we only add a new parameter it should be no breaking change for any existing code. New code simply can add the parameter if needed.

If class not final and method not private — adding new param is breaking change, because this class might be extended in someone's project.

[taylorotwell]

Thanks for your pull request to Laravel!

Unfortunately, I'm going to delay merging this code for now. To preserve our ability to adequately maintain the framework, we need to be very careful regarding the amount of code we include.

If applicable, please consider releasing your code as a package so that the community can still take advantage of your contributions!