Add a link to index types doc

Author: patiencedaur

doc/getting_started/using_docker.rst

@@ -129,6 +129,7 @@ Create the first :ref:`index <index-box_index>` (named ``primary``):
                   > })
 
 This is a primary index based on the ``id`` field of each tuple.
+``TREE`` is the most universal index type. To learn more, check the documentation on Tarantool :ref:`index types <index-types>`.
 
 Insert three :term:`tuples <tuple>` (our name for records)
 into the space:

doc/getting_started/using_package_manager.rst

@@ -119,6 +119,7 @@ Here is how to create a simple test database after installation.
                > })
 
    This is a primary index based on the ``id`` field of each tuple.
+   ``TREE`` is the most universal index type. To learn more, check the documentation on Tarantool :ref:`index types <index-types>`.
 
 #. Insert three :term:`tuples <tuple>` (our name for records)
    into the space:

locale/ru/LC_MESSAGES/getting_started/getting_started_db.po

@@ -193,8 +193,10 @@ msgstr ""
 "              > parts = {'id'}\n"
 "              > })"
 
-msgid "This is a primary index based on the ``id`` field of each tuple."
-msgstr "Это первичный индекс по полю ``id`` в каждом кортеже."
+msgid "This is a primary index based on the ``id`` field of each tuple. "
+"``TREE`` is the most universal index type. To learn more, check the documentation on Tarantool :ref:`index types <index-types>`."
+msgstr "Это первичный индекс по полю ``id`` в каждом кортеже. "
+"Тип индекса ``TREE`` --- самый универсальный. Подробная информация изложена в документации о :ref:`типах индексов в Tarantool <index-types>`."
 
 msgid ""
 "Insert three :term:`tuples <tuple>` (our name for records) into the space:"

locale/ru/LC_MESSAGES/getting_started/using_docker.po

@@ -199,8 +199,10 @@ msgstr ""
 "              > parts = {'id'}\n"
 "              > })"
 
-msgid "This is a primary index based on the ``id`` field of each tuple."
-msgstr "Это первичный индекс по полю ``id`` в каждом кортеже."
+msgid "This is a primary index based on the ``id`` field of each tuple. "
+"``TREE`` is the most universal index type. To learn more, check the documentation on Tarantool :ref:`index types <index-types>`."
+msgstr "Это первичный индекс по полю ``id`` в каждом кортеже. "
+"Тип индекса ``TREE`` --- самый универсальный. Подробная информация изложена в документации о :ref:`типах индексов в Tarantool <index-types>`."
 
 msgid ""
 "Insert three :ref:`tuples <index-box_tuple>` (our name for records) into the"