[TASK] Move rest link chapters on separate pages

Documentation/Reference/ReStructuredText/Links/Api.rst

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+:navigation-title: API links
+
+..  _links-api:
+
+================================================
+API links: More information on TYPO3 PHP classes
+================================================
+
+At https://api.typo3.org/ all classes and interfaces of the
+TYPO3 Core are listed with their public members and descriptions. The API
+itself also links to the source code on GitHub. You can use implicit and
+explicit links to these:
+
+..  contents::
+
+..  _links-api-explicit:
+
+Explicit links to api.typo3.org
+===============================
+
+..  literalinclude:: _Api.rst.txt
+
+The links then look like this:
+
+..  include:: _Api.rst.txt
+
+Explicit links can use the interlink scheme to link to different TYPO3 versions.
+If not specified they also link to the :confval:`guides-extension-typo3-core-preferred`.
+
+If you want to link directly to the source files on GitHub, you can use the
+:ref:`:t3src: text role <linking-core-source>`.
+
+..  _links-api-fqn:
+
+Implicit links to fully-qualified names
+=======================================
+
+Implicit links have the advantage that they show more information about the
+class or interface in a popover while they still offer a link to the API.
+
+..  literalinclude:: _ApiImplicit.rst.txt
+
+The links then look like this:
+
+..  include:: _ApiImplicit.rst.txt
+
+As you can see, only links to the namespace `/TYPO3/CMS` can be linked to the
+API. We do display general information about some other namespaces that are
+commonly used in TYPO3 development. Example namespaces should always start with
+`\MyVendor\`. Use `\MyVendor\MyExtension\` for extensions and
+`\MyVendor\MySitepackage\` for sitepackages.
+
+Implicit links are always referring to your
+:confval:`guides-extension-typo3-core-preferred` as set in the
+:ref:`guides.xml <guides-xml>`.
+
+..  _links-api-short:
+
+Links to the API with the short class name
+==========================================
+
+Using the text role `php-short` you can display the short name of the class
+or interface withing the text. Other then that it works just like the
+:ref:`:php: <links-api-fqn>` text role.
+
+..  literalinclude:: _ApiShort.rst.txt
+
+The links then look like this:
+
+..  include:: _ApiShort.rst.txt

Documentation/Reference/ReStructuredText/Links/_Api.rst.txt

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+..  Explicit links
+
+*   :api-class:`\TYPO3\CMS\Extbase\Routing\ExtbasePluginEnhancer`
+*   :api-class:`In main <api-dev:\TYPO3\CMS\Extbase\Routing\ExtbasePluginEnhancer>`
+*   :api-class:`In 11.5 <api-11:\TYPO3\CMS\Extbase\Routing\ExtbasePluginEnhancer>`
+*   :api-class:`\TYPO3\CMS\Core\EventDispatcher\EventDispatcher
+    <api:\TYPO3\CMS\Core\EventDispatcher\EventDispatcher>`

Documentation/Reference/ReStructuredText/Links/_ApiImplicit.rst.txt

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+..  Implicit links using the :php: text role:
+
+*   :php:`\TYPO3\CMS\Adminpanel\Controller\AjaxController`
+*   :php:`\TYPO3\CMS\Core\Http\Dispatcher`
+*   :php:`\TYPO3\CMS\Adminpanel\ModuleApi\ContentProviderInterface`
+*   :php:`\TYPO3\CMS\Backend\Search\LiveSearch\SearchDemand\DemandPropertyName`
+*   :php:`\TYPO3\CMS\Backend\Form\Behavior\OnFieldChangeTrait`
+*   :php:`\Psr\Log\LoggerInterface`
+*   :php:`\TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper`
+*   :php:`\MyVendor\MyExtension\FooBar`
+*   :php:`\Foo\Bar\Something`
+
+..  prevent help text being displayed
+
+`This\Is\No\Class`

Documentation/Reference/ReStructuredText/Links/_ApiShort.rst.txt

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+..  Short PHP class names, still linking to the API:
+
+*   :php-short:`\TYPO3\CMS\Adminpanel\Controller\AjaxController`
+*   :php-short:`\TYPO3\CMS\Core\Http\Dispatcher`
+*   :php-short:`\TYPO3\CMS\Adminpanel\ModuleApi\ContentProviderInterface`
+*   :php-short:`\TYPO3\CMS\Backend\Search\LiveSearch\SearchDemand\DemandPropertyName`
+*   :php-short:`\TYPO3\CMS\Backend\Form\Behavior\OnFieldChangeTrait`
+*   :php-short:`\Psr\Log\LoggerInterface`
+*   :php-short:`\TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper`
+*   :php-short:`\MyVendor\MyExtension\FooBar`
+*   :php-short:`\Foo\Bar\Something`