Combine component and framework docs for Serializer

Author: wouterj

_build/redirection_map

@@ -524,7 +524,7 @@
 /testing/functional_tests_assertions /testing#testing-application-assertions
 /components https://symfony.com/components
 /components/index https://symfony.com/components
-/serializer/normalizers /components/serializer#normalizers
+/serializer/normalizers /serializer#serializer-built-in-normalizers
 /logging/monolog_regex_based_excludes /logging/monolog_exclude_http_codes
 /security/named_encoders /security/named_hashers
 /security/experimental_authenticators /security
@@ -555,3 +555,5 @@
 /notifier/chatters /notifier#sending-chat-messages
 /notifier/texters /notifier#sending-sms
 /notifier/events /notifier#notifier-events
+/components/serializer /serializer
+/serializer/custom_encoder /serializer/encoders#serializer-custom-encoder

_images/components/serializer/serializer_workflow.svg renamed to _images/serializer/serializer_workflow.svg

@@ -26,6 +26,8 @@ default configuration::
 
     $propertyAccessor = PropertyAccess::createPropertyAccessor();
 
+.. _property-access-reading-arrays:
+
 Reading from Arrays
 -------------------
 

_images/sources/components/serializer/serializer_workflow.dia renamed to _images/sources/serializer/serializer_workflow.dia

@@ -423,8 +423,8 @@ SerializerExtractor
 
     This extractor depends on the `symfony/serializer`_ library.
 
-Using :ref:`groups metadata <serializer-using-serialization-groups-annotations>`
-from the :doc:`Serializer component </components/serializer>`,
+Using :ref:`groups metadata <serializer-groups-annotation>`
+from the :doc:`Serializer component </serializer>`,
 the :class:`Symfony\\Component\\PropertyInfo\\Extractor\\SerializerExtractor`
 provides list information. This extractor is *not* registered automatically
 with the ``property_info`` service in the Symfony Framework::