Clarify the difference in features per Tarantool version (#2265)

Reviewed by Alexander Turenko and Nick Volynkin, translated by Maria Kovalevskaya, translation reviewed by Patience Daur.

Co-authored-by: Alexandra Mirzuitova <alexandra.mirzuitova@gmail.com>
Co-authored-by: Maria Kovalevskaya <maryartkey@gmail.com>
Co-authored-by: Patience Daur <patiencedaur@gmail.com>
Co-authored-by: Kseniia Antonova <xuniq.is.here@gmail.com>

Author: 4 people

doc/release.rst

@@ -112,6 +112,7 @@ Release notes for series before 1.10 are also available:
 
     release/policy
     release/new-policy
+    release/major-features
     release/2.8.1
     release/2.7.2
     release/2.7.1

doc/release/major-features.rst

@@ -0,0 +1,105 @@
+Major features
+==============
+
+Every released version of Tarantool brings some notable features and fixes, which are all listed in
+:doc:`the release notes </release>`.
+To keep track of the major features in each version of the Tarantool easier, you can use the table below.
+
+..  container:: table
+
+    ..  rst-class:: left-align-column-1
+    ..  rst-class:: left-align-column-2
+
+    ..  list-table::
+        :widths: 20 80
+        :header-rows: 1
+
+        *   -   Since version
+            -   Feature
+
+        *   -   2.8.1
+            -   :ref:`Multiple iproto threads <cfg_networking-iproto_threads>` (:tarantool-issue:`5645`)
+
+        *   -   2.8.1
+            -   Set :doc:`box.cfg </reference/reference_lua/box_cfg>` options with environment variables (:tarantool-issue:`5602`)
+
+        *   -   2.8.1
+            -   Friendly :ref:`LuaJIT memory profiler report <profiler_analysis>` (:tarantool-issue:`5811`)
+
+        *   -   2.8.1
+            -   ``--leak-only`` LuaJIT memory profiler option (:tarantool-issue:`5812`)
+
+        *   -   2.7.1
+            -   :doc:`LuaJIT memory profiler </book/app_server/luajit_memprof>` (:tarantool-issue:`5442`)
+
+        *   -   2.7.1
+            -   SQL :doc:`ALTER TABLE ADD COLUMN </reference/reference_sql/sql_statements_and_clauses>` statement support for empty tables (:tarantool-issue:`2349`, :tarantool-issue:`3075`)
+
+        *   -   2.6.3, 2.7.2
+            -   The concept of WAL queue (:tarantool-issue:`5536`)
+
+        *   -   2.6.3, 2.7.2, 2.8.1
+            -   :doc:`box.ctl.promote() </reference/reference_lua/box_ctl/promote>` and the concept of manual elections (:tarantool-issue:`3055`)
+
+        *   -   2.6.1
+            -   :ref:`LuaJIT platform metrics <metrics-luajit>` (:tarantool-issue:`5187`)
+
+        *   -   2.6.1
+            -   :doc:`Automated leader election </book/replication/repl_leader_elect>` based on Raft algorithm (:tarantool-issue:`1146`)
+
+        *   -   2.6.1
+            -   :ref:`Transactional manager <atomic-transactional-manager>` for memtx engine (:tarantool-issue:`4897`)
+
+        *   -   2.5.3, 2.6.2, 2.7.1
+            -   Expression evaluation for :ref:`replication_synchro_quorum <cfg_replication-replication_synchro_quorum>` (:tarantool-issue:`5446`)
+
+        *   -   2.5.3, 2.6.2
+            -   :doc:`box.ctl.is_recovery_finished() </reference/reference_lua/box_ctl/is_recovery_finished>` for memtx engine (:tarantool-issue:`5187`)
+
+        *   -   2.5.1
+            -   :doc:`Synchronous replication </book/replication/repl_sync>` (beta) (:tarantool-issue:`4842`)
+
+        *   -   2.5.1
+            -   Allow an :doc:`anonymous replica </reference/reference_lua/box_info/replication_anon>` to follow another anonymous replica (:tarantool-issue:`4696`)
+
+        *   -   2.4.1
+            -   :ref:`UUID type for field and index <_index-box_uuid>` (:tarantool-issue:`4268`, :tarantool-issue:`2916`)
+
+        *   -   2.4.1
+            -   :doc:`popen </reference/reference_lua/popen>` built-in module (:tarantool-issue:`4031`)
+
+        *   -   2.4.1
+            -   Ability to create :doc:`custom error types </reference/reference_lua/box_error/custom_type>` (:tarantool-issue:`4398`)
+
+        *   -   2.4.1
+            -   :doc:`Transparent marshalling </reference/reference_lua/box_error/new>` through ``net.box`` (:tarantool-issue:`4398`)
+
+        *   -   2.4.1
+            -   :doc:`Stacked diagnostic area </reference/reference_lua/box_error/error_object>` (:tarantool-issue:`1148`)
+
+        *   -   2.3.1
+            -   :doc:`Field name and JSON path updates </reference/reference_lua/json_paths>` (:tarantool-issue:`1261`)
+
+        *   -   2.3.1
+            -   :ref:`Anonymous replica <cfg_replication-replication_anon>` type (:tarantool-issue:`3186`)
+
+        *   -   2.3.1
+            -   :doc:`DOUBLE </reference/reference_sql/sql_user_guide>` type in SQL (:tarantool-issue:`3812`)
+
+        *   -   2.3.1
+            -   Support of :ref:`decimals <index-box_data-types>` in spaces, ``decimal`` field type (:tarantool-issue:`4333`)
+
+        *   -   2.3.1
+            -   :ref:`fiber.top() <fiber-top>` function in Lua (:tarantool-issue:`2694`)
+
+        *   -   2.3.1
+            -   Feed data from memory during replica initial join (:tarantool-issue:`1271`)
+
+        *   -   2.3.1
+            -   SQL prepared statements support and cache (:tarantool-issue:`2592`, :tarantool-issue:`3292`)
+
+        *   -   2.3.1
+            -   :doc:`_session_settings </reference/reference_lua/box_space/_session_settings>` service space (:tarantool-issue:`4511`)
+
+
+