[DOCS] Add kibana-verification-tool and CLI main page (#120836) (#120970)

* [DOCS] Add kibana-verification-tool and CLI main page

* Change wording from generating to retrieving

Co-authored-by: Adam Locke <adam.locke@elastic.co>

docs/user/commands/cli-commands.asciidoc

@@ -0,0 +1,8 @@
+[[cli-commands]]
+== Command line tools
+
+{kib} provides the following tools for configuring security and performing other tasks from the command line:
+
+* <<kibana-verification-code,`kibana-verification-code`>>
+
+include::kibana-verification-code.asciidoc[]

docs/user/commands/kibana-verification-code.asciidoc

@@ -0,0 +1,44 @@
+[[kibana-verification-code]]
+=== kibana-verification-code
+
+The `kibana-verification-code` tool retrieves a verification code for enrolling
+a {kib} instance with a secured {es} cluster. 
+
+[discrete]
+==== Synopsis
+
+[source,shell]
+----
+bin/kibana-verification-code
+[-V, --version] [-h, --help]
+----
+
+[discrete]
+==== Description
+
+Use this command to retrieve a verification code for {kib}. You enter this code
+in {kib} when manually configuring a secure connection with an {es} cluster.
+This tool is useful if you don’t have access to the {kib} terminal output, such
+as on a hosted environment. You can connect to a machine where {kib} is
+running (such as using SSH) and retrieve a verification code that you enter in
+{kib}.
+
+IMPORTANT: You must run this tool on the same machine where {kib} is running.
+
+[discrete]
+[[kibana-verification-code-parameters]]
+==== Parameters
+
+`-h, --help`:: Returns all of the command parameters.
+
+`-V, --version`:: Displays the {kib} version number.
+
+[discrete]
+==== Examples
+
+The following command retrieves a verification code for {kib}.
+
+[source,shell]
+----
+bin/kibana-verification-code
+----

docs/user/setup.asciidoc

@@ -70,3 +70,5 @@ include::monitoring/configuring-monitoring.asciidoc[leveloffset=+1]
 include::monitoring/monitoring-metricbeat.asciidoc[leveloffset=+2]
 include::monitoring/viewing-metrics.asciidoc[leveloffset=+2]
 include::monitoring/monitoring-kibana.asciidoc[leveloffset=+2]
+
+include::commands/cli-commands.asciidoc[]