minor #17783 Combine component and framework docs for Serializer (wouterj)

This PR was merged into the 6.4 branch.

Discussion
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Combine component and framework docs for Serializer

A very early PR, to avoid someone else working on this as well (especially `@fabpot` who is on fire with this type of PRs lately).

The serializer docs are the most unfortunate component - framework documentation situations I think, with most of the docs in the component docs instead of framework one. This PR is focused on combining all the information in the framework guide as a start.

closes #17814

Commits
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8a1497b Combine component and framework docs for Serializer

Author: wouterj

_build/redirection_map

@@ -525,7 +525,7 @@
 /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
 /components/inflector /components/string#inflector
@@ -566,3 +566,5 @@
 /messenger/dispatch_after_current_bus /messenger#messenger-transactional-messages
 /messenger/multiple_buses /messenger#messenger-multiple-buses
 /frontend/encore/server-data /frontend/server-data
+/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

@@ -458,9 +458,9 @@ SerializerExtractor
 
     This extractor depends on the `symfony/serializer`_ library.
 
-Using :ref:`groups metadata <serializer-using-serialization-groups-attributes>`
-from the :doc:`Serializer component </components/serializer>`,
-the :class:`Symfony\\Component\\PropertyInfo\\Extractor\\SerializerExtractor`
+Using :ref:`groups metadata <serializer-groups-attribute>` 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::