[DOCS] Moves dashboard_only_mode folder to docs (#19532)

docs/index.asciidoc

@@ -67,7 +67,7 @@ include::{xkb-repo-dir}/management/watcher-ui/index.asciidoc[]
 
 include::{xkb-repo-dir}/upgrade-assistant/index.asciidoc[]
 
-include::{xkb-repo-dir}/dashboard_only_mode/index.asciidoc[]
+include::management/dashboard_only_mode/index.asciidoc[]
 
 include::{xkb-repo-dir}/reporting/index.asciidoc[]
 

docs/management/dashboard_only_mode/advanced_configuration.asciidoc

@@ -6,14 +6,14 @@ Kibana comes preconfigured with a reserved role called `kibana_dashboard_only_us
 for most use cases.  However, if your setup requires a custom Kibana index, you can manually create
 Dashboard Mode roles.
 
-To do so, go into Management > Advanced Settings and search for `xpackDashboardMode:roles`. Then assign whatever
+To do so, go into *Management > Advanced Settings* and search for `xpackDashboardMode:roles`. Then assign whatever
 role names you wish to use to flag a user for Dashboard Only mode.
 
-image:dashboard_only_mode/images/advanced_dashboard_mode_role_setup.png["Advanced dashboard mode role setup"]
+image:management/dashboard_only_mode/images/advanced_dashboard_mode_role_setup.png["Advanced dashboard mode role setup"]
 
 It isn't necessary for Dashboard Only mode roles to have any additional permissions, but it's a convenient location
 to also place access rules to the custom Kibana index. If you wish to grant read only access to your custom Kibana
 index, it must have `view_index_metadata` permissions as well as `read` permissions.  These role settings are available
-under Management > Security > Roles.
+under *Management > Security > Roles*.
 
-image:dashboard_only_mode/images/custom_dashboard_mode_role.png["Custom dashboard mode role with read permissions on a custom kibana index"]
+image:management/dashboard_only_mode/images/custom_dashboard_mode_role.png["Custom dashboard mode role with read permissions on a custom kibana index"]

docs/management/dashboard_only_mode/index.asciidoc

@@ -8,9 +8,9 @@ reserved `kibana_dashboard_only_user` role.
 When you assign a user this role, the next time they sign in to Kibana they will only be able to see the Dashboard app,
 and no editing tools will be available.
 
-image:dashboard_only_mode/images/view_only_listing_page.png["View Only Dashboard Listing Page"]
+image:management/dashboard_only_mode/images/view_only_listing_page.png["View Only Dashboard Listing Page"]
 
-image:dashboard_only_mode/images/view_only_dashboard.png["View Only Dashboard"]
+image:management/dashboard_only_mode/images/view_only_dashboard.png["View Only Dashboard"]
 
 IMPORTANT: If a user is also assigned the reserved `superuser` role, they will be able to see all of Kibana and have
 full access.