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_group.rst

@@ -0,0 +1,44 @@
+.. _mmctl_group:
+
+mmctl group
+-----------
+
+Management of groups
+
+Synopsis
+~~~~~~~~
+
+
+Management of groups
+
+Options
+~~~~~~~
+
+::
+
+  -h, --help   help for group
+
+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 <mmctl.rst>`_ 	 - Remote client for the Open Source, self-hosted Slack-alternative
+* `mmctl group channel <mmctl_group_channel.rst>`_ 	 - Management of channel groups
+* `mmctl group list-ldap <mmctl_group_list-ldap.rst>`_ 	 - List LDAP groups
+* `mmctl group team <mmctl_group_team.rst>`_ 	 - Management of team groups
+* `mmctl group user <mmctl_group_user.rst>`_ 	 - Management of custom user groups
+