[docs] reorder chapter "Engines & Settings"

- Split chapter "Engines" and rename it into "Engines & Settings"
- Move docs/admin/engines.rst -> docs/admin/engines/engine_settings.rst

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

docs/admin/engines/engine_settings.rst

@@ -1,28 +1,13 @@
-=======
-Engines
-=======
+.. _general engine settings:
 
-Special Engine Settings
+=======================
+General Engine Settings
 =======================
 
 .. sidebar:: Further reading ..
 
+   - :ref:`engines-dev`
    - :ref:`settings engine`
-   - :ref:`engine settings` & :ref:`engine file`
-
-.. toctree::
-   :maxdepth: 1
-
-   engines/recoll
-   engines/sql-engines
-   engines/command-line-engines
-   engines/searx.engines.xpath
-
-
-.. _engines generic:
-
-General Engine Settings
-=======================
 
 Explanation of the :ref:`general engine configuration` shown in the table
 :ref:`configured engines`.

docs/admin/engines/index.rst

@@ -0,0 +1,21 @@
+.. _engines and settings:
+
+==================
+Engines & Settings
+==================
+
+.. sidebar:: Further reading ..
+
+   - :ref:`settings engine`
+   - :ref:`engine settings` & :ref:`engine file`
+
+.. toctree::
+   :maxdepth: 1
+
+   engine_settings
+   recoll
+   sql-engines
+   command-line-engines
+   searx.engines.xpath
+
+

docs/admin/index.rst

@@ -14,10 +14,10 @@ Administrator documentation
    installation-docker
    update-searx
    settings
+   engines/index
    api
    architecture
    filtron
    morty
-   engines
    plugins
    buildhosts

docs/admin/settings.rst

@@ -229,6 +229,7 @@ Engine settings
 
 .. sidebar:: Further reading ..
 
+   - :ref:`general engine settings`
    - :ref:`engines-dev`
 
 .. code:: yaml