mmctl: add listing oauth apps (#25497)

* mmctl: add listing oauth apps

* Fix tests

* Update mmctl docs

* Fix tests

* Update server/cmd/mmctl/commands/oauth.go

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

* Update server/cmd/mmctl/commands/oauth.go

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

* Add paging

* Update docs

---------

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

server/cmd/mmctl/docs/mmctl_oauth.rst

@@ -0,0 +1,41 @@
+.. _mmctl_oauth:
+
+mmctl oauth
+-----------
+
+Management of OAuth2 apps
+
+Synopsis
+~~~~~~~~
+
+
+Management of OAuth2 apps
+
+Options
+~~~~~~~
+
+::
+
+  -h, --help   help for oauth
+
+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 oauth list <mmctl_oauth_list.rst>`_ 	 - List OAuth2 apps
+