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_command.rst

@@ -0,0 +1,46 @@
+.. _mmctl_command:
+
+mmctl command
+-------------
+
+Management of slash commands
+
+Synopsis
+~~~~~~~~
+
+
+Management of slash commands
+
+Options
+~~~~~~~
+
+::
+
+  -h, --help   help for command
+
+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 command archive <mmctl_command_archive.rst>`_ 	 - Archive a slash command
+* `mmctl command create <mmctl_command_create.rst>`_ 	 - Create a custom slash command
+* `mmctl command list <mmctl_command_list.rst>`_ 	 - List all commands on specified teams.
+* `mmctl command modify <mmctl_command_modify.rst>`_ 	 - Modify a slash command
+* `mmctl command move <mmctl_command_move.rst>`_ 	 - Move a slash command to a different team
+* `mmctl command show <mmctl_command_show.rst>`_ 	 - Show a custom slash command
+