Includes mmctl into the mono-repo (#23091)

* Includes mmctl into the mono-repo

* Update to use the new public module paths

* Adds docs check to the mmctl CI

* Fix public utils import path

* Tidy up modules

* Fix linter

* Update CI tasks to use the new file structure

* Update CI references

server/cmd/mmctl/docs/mmctl_channel_modify.rst

@@ -0,0 +1,55 @@
+.. _mmctl_channel_modify:
+
+mmctl channel modify
+--------------------
+
+Modify a channel's public/private type
+
+Synopsis
+~~~~~~~~
+
+
+Change the Public/Private type of a channel.
+Channel can be specified by [team]:[channel]. ie. myteam:mychannel or by channel ID.
+
+::
+
+  mmctl channel modify [channel] [flags]
+
+Examples
+~~~~~~~~
+
+::
+
+    channel modify myteam:mychannel --private
+    channel modify channelId --public
+
+Options
+~~~~~~~
+
+::
+
+  -h, --help      help for modify
+      --private   Convert the channel to a private channel
+      --public    Convert the channel to a public channel
+
+Options inherited from parent commands
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+      --config string                path to the configuration file (default "$XDG_CONFIG_HOME/mmctl/config")
+      --disable-pager                disables paged output
+      --insecure-sha1-intermediate   allows to use insecure TLS protocols, such as SHA-1
+      --insecure-tls-version         allows to use TLS versions 1.0 and 1.1
+      --json                         the output format will be in json format
+      --local                        allows communicating with the server through a unix socket
+      --quiet                        prevent mmctl to generate output for the commands
+      --strict                       will only run commands if the mmctl version matches the server one
+      --suppress-warnings            disables printing warning messages
+
+SEE ALSO
+~~~~~~~~
+
+* `mmctl channel <mmctl_channel.rst>`_ 	 - Management of channels
+