[DOCS] Add documentation about site sets

Refs: #4527

Author: dmitryd

Documentation/Configuration/Index.rst

@@ -29,5 +29,6 @@ Configuration Reference
 	./Reference/TxSolrSuggest
 	./Reference/TxSolrStatistics
 	./Reference/TxSolrLogging
+	./SiteSets
 	./Reference/ExtensionSettings
 	./Reference/SolrConnection

Documentation/Configuration/SiteSets.rst

@@ -0,0 +1,88 @@
+.. _configuration-site-sets:
+
+Site Sets
+=========
+
+.. versionadded:: 14.0
+
+   EXT:solr provides TYPO3 site sets in :file:`Configuration/Sets/`.
+
+TYPO3 site sets are the recommended way to provide reusable site-scoped
+configuration in TYPO3 14 projects. EXT:solr ships site sets for the base
+configuration, optional frontend assets, OpenSearch and the example
+configurations that were previously available as static TypoScript includes.
+
+If your project does not use TypoScript template records
+(``sys_template``), add EXT:solr configuration through site set
+dependencies. TYPO3 resolves, orders and deduplicates site set dependencies,
+which makes this approach more robust than managing dependencies manually in
+TypoScript records.
+
+Example site configuration:
+
+.. code-block:: yaml
+   :caption: config/sites/my-site/config.yaml
+
+   dependencies:
+     - apache-solr-for-typo3/solr
+     - apache-solr-for-typo3/solr-stylesheets
+
+TypoScript template records are still supported for existing installations and
+mixed setups. When using site sets, prefer dependencies between sets instead
+of cross-extension TypoScript imports or duplicated static includes.
+
+Available Site Sets
+-------------------
+
+The following site sets are provided by EXT:solr:
+
+.. list-table::
+   :header-rows: 1
+   :widths: 45 55
+
+   * - Site set
+     - Description
+   * - ``apache-solr-for-typo3/solr``
+     - Base Configuration
+   * - ``apache-solr-for-typo3/solr-bootstrap-css``
+     - Bootstrap CSS Framework
+   * - ``apache-solr-for-typo3/solr-stylesheets``
+     - Default Stylesheets
+   * - ``apache-solr-for-typo3/solr-open-search``
+     - OpenSearch
+   * - ``apache-solr-for-typo3/solr-example-ajaxify``
+     - Ajaxify the search results
+   * - ``apache-solr-for-typo3/solr-example-boost-queries``
+     - Boost more recent results
+   * - ``apache-solr-for-typo3/solr-example-everything-on``
+     - Everything On
+   * - ``apache-solr-for-typo3/solr-example-filter-pages``
+     - Filter to only show page results
+   * - ``apache-solr-for-typo3/solr-example-suggest``
+     - Suggest/autocomplete
+   * - ``apache-solr-for-typo3/solr-example-facets-options``
+     - Options facet on author field
+   * - ``apache-solr-for-typo3/solr-example-facets-options-toggle``
+     - Options with on/off toggle
+   * - ``apache-solr-for-typo3/solr-example-facets-options-prefix-grouped``
+     - Options grouped by prefix
+   * - ``apache-solr-for-typo3/solr-example-facets-options-single-mode``
+     - Options with singlemode (only one option at a time)
+   * - ``apache-solr-for-typo3/solr-example-facets-options-filtered``
+     - Options filterable by option value
+   * - ``apache-solr-for-typo3/solr-example-facets-query-group``
+     - QueryGroup facet on the created field
+   * - ``apache-solr-for-typo3/solr-example-facets-hierarchy``
+     - Hierarchy facet on the rootline field
+   * - ``apache-solr-for-typo3/solr-example-facets-date-range``
+     - DateRange facet with datepicker on created field
+   * - ``apache-solr-for-typo3/solr-example-numeric-range``
+     - NumericRange facet with slider on pid field
+   * - ``apache-solr-for-typo3/solr-example-type-field-group``
+     - Fieldgroup on type field
+   * - ``apache-solr-for-typo3/solr-example-pid-query-group``
+     - Querygroup on pid field
+   * - ``apache-solr-for-typo3/solr-example-index-queue-news``
+     - Index Queue Configuration for news
+   * - ``apache-solr-for-typo3/solr-example-index-queue-news-content-elements``
+     - Index Queue Configuration for news with content elements

Documentation/GettingStarted/ConfigureExtension.rst

@@ -23,11 +23,19 @@ Underlying settings can be found in the extension configuration, though the defa
 
 
 
-Static TypoScript
------------------
+Site Sets or Static TypoScript
+------------------------------
 
-The extension already comes with basic TypoScript configuration that will work for small pages out of the box. For now create or
-edit an existing TypoScript Template record in your page tree and add the provided static TypoScript:
+The extension already comes with basic TypoScript configuration that will work
+for small pages out of the box.
+
+For TYPO3 14 projects, the recommended setup is to include EXT:solr through
+site set dependencies. See :ref:`configuration-site-sets` for the available
+site sets and an example site configuration.
+
+If your project still uses TypoScript Template records, create or edit an
+existing TypoScript Template record in your page tree and add the provided
+static TypoScript:
 
 .. image:: /Images/GettingStarted/typo3-include-static-typoscript.png
 

Documentation/Releases/solr-release-14-0.rst

@@ -21,6 +21,16 @@ TYPO3 14 LTS Compatibility
 EXT:solr has been fully adapted for TYPO3 14 LTS, including Fluid v5 ViewHelper
 compatibility, TCA changes, deprecation removals, and testing framework updates.
 
+TYPO3 Site Sets
+~~~~~~~~~~~~~~~
+
+EXT:solr now provides TYPO3 site sets for the base configuration, optional
+frontend assets, OpenSearch and the shipped example configurations. For TYPO3
+14 projects that do not use TypoScript template records, site set dependencies
+are the recommended way to include EXT:solr configuration.
+
+See :ref:`configuration-site-sets` for the full list of available site sets.
+
 XLIFF 2.0 Migration
 ~~~~~~~~~~~~~~~~~~~