Make ApiResource shorter

[tourze]

Sometime we need to write a long code like :

#[ApiResource(
    routePrefix: '/live-chat',
    normalizationContext: ['groups' => ['restful_read']],
    denormalizationContext: ['groups' => ['restful_write']],
    openapiContext: ['tags' => ['LiveChat']],
    order: ['id' => 'DESC'],
    security: 'is_granted("ROLE_OPERATOR")'
)]

It is too long for person to read.
Can we just create a new Attribute class, class RestfulApi extends ApiResource, and move some normal logic into consturctor?
Then we just add code like this:

#[RestfulApi(
    routePrefix: '/live-chat',
)]

Related code:

core/src/Metadata/Resource/Factory/AttributesResourceNameCollectionFactory.php

Line 60 in 1a3ae34

if ($reflectionClass->getAttributes(ApiResource::class)) {

[dunglas]

Indeed, the code should be if ($reflectionClass->getAttributes(ApiResource::class, \ReflectionAttribute::IS_INSTANCEOF)) {.

[yobrx]

@dunglas #5175

My first PR on Api Platform 🙏

[yobrx]

It's fixed on 3.0.4 last upgrade