Added support for Symfony\Component\HttpKernel\Exception\* documentation when annotated in exceptions

[phpsa]

using this example docblock:

    /**
     * Flags the policy for automatic renewal
     *
     * @param string $policyId the policy id to flag for renewal
     *
     * @return array{status:bool}
     * @response array{status:true}
     *
     * @throws BadRequestHttpException|NotAcceptableHttpException
     */

to have automated responses mapped over:

[romalytvynenko]

NotFoundHttpException is handled in other extension, please make sure to handle it in a single extension

[romalytvynenko]

@phpsa good idea! Let's just make sure we don't handle the same exceptions types in different extensions and I'm happy to merge. Thank you!

Oh, almost forgot. Please also include some tests

[phpsa]

@romalytvynenko - thanks for the feedback,
have removed NotFound and added a test to confirm they are pickedup.

[romalytvynenko]

@phpsa made some changes before merging. The main difference is that in your PR you documented ANY exception as 500 response. I'd prefer not do that – not documenting the response is better that documenting it in a wrong way (some exceptions MAY be renderable and there a custom status MAY be used). Other than that – thanks for the contribution and sorry it took long to get to it.