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_plugin_install-url.rst

@@ -0,0 +1,56 @@
+.. _mmctl_plugin_install-url:
+
+mmctl plugin install-url
+------------------------
+
+Install plugin from url
+
+Synopsis
+~~~~~~~~
+
+
+Supply one or multiple URLs to plugins compressed in a .tar.gz file. Plugins must be enabled in the server's config settings
+
+::
+
+  mmctl plugin install-url <url>... [flags]
+
+Examples
+~~~~~~~~
+
+::
+
+    # You can install one plugin
+    $ mmctl plugin install-url https://example.com/mattermost-plugin.tar.gz
+
+    # Or install multiple in one go
+    $ mmctl plugin install-url https://example.com/mattermost-plugin-one.tar.gz https://example.com/mattermost-plugin-two.tar.gz
+
+Options
+~~~~~~~
+
+::
+
+  -f, --force   overwrite a previously installed plugin with the same ID, if any
+  -h, --help    help for install-url
+
+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 plugin <mmctl_plugin.rst>`_ 	 - Management of plugins
+