[Docs] Add initial changelog document (#2611)

* Add initial changelog document

* add initial links

* oops

docs/changelog_3_1_0.rst

@@ -0,0 +1,36 @@
+.. v3.1.0 Changelog
+
+================
+v3.1.0 Changelog
+================
+
+-----
+Audio
+-----
+
+------
+Config
+------
+
+ * Updated Mongo driver to support large guilds (`#2536`_)
+ * Introduced ``init_custom`` method on Config objects (`#2545`_)
+ * We now record custom group primary key lengths in the core config object (`#2550`_)
+ * Migrated internal UUIDs to maintain cross platform consistency (`#2604`_)
+
+----------
+discord.py
+----------
+
+-------------
+Setup Scripts
+-------------
+
+ * ``redbot-setup`` now uses the click CLI library (`#2579`_)
+ * ``redbot-setup convert`` now used to convert between libraries (`#2579`_)
+ * Backup support for Mongo is currently broken (`#2579`_)
+
+.. _#2536: https://github.com/Cog-Creators/Red-DiscordBot/pull/2536
+.. _#2545: https://github.com/Cog-Creators/Red-DiscordBot/pull/2545
+.. _#2550: https://github.com/Cog-Creators/Red-DiscordBot/pull/2550
+.. _#2579: https://github.com/Cog-Creators/Red-DiscordBot/pull/2579
+.. _#2604: https://github.com/Cog-Creators/Red-DiscordBot/pull/2604

docs/index.rst

@@ -44,6 +44,11 @@ Welcome to Red - Discord Bot's documentation!
     framework_rpc
     framework_utils
 
+.. toctree::
+    :maxdepth: 2
+    :caption: Changelogs:
+
+    changelog_3_1_0
 
 
 Indices and tables