Add CLI-reference related to service catalog

Added respective command reference related to service catalog in `cli-reference.md`
under docs section

docs/cli-reference.md

@@ -34,6 +34,7 @@ Find more information at https://github.com/redhat-developer/odo
 | [log](#log)               | Retrieve the log for the given component.      |
 | [project](#project)       | Perform project operations                     |
 | [push](#push)             | Push source code to a component                |
+| [service](#service)       | Perform service catalog operations             |
 | [storage](#storage)       | Perform storage operations                     |
 | [update](#update)         | Update the source code path of a component     |
 | [url](#url)               | Expose component to the outside world          |
@@ -125,13 +126,16 @@ Performs application operations related to your OpenShift project.
 
 ```sh
   # Get the supported components
-  odo catalog list
-
-  # Search for a supported component
-  odo search nodejs
+  odo catalog list components
+  
+  # Get the supported services from service catalog
+  odo catalog list services
 
   # Search for a component
-  odo catalog search pyt
+  odo catalog search components pyt
+
+  # Search for a service
+  odo catalog search service mysql
 
 ```
 
@@ -341,6 +345,27 @@ Perform project operations
 
 Push source code to a component.
 
+## service
+
+`service`
+
+> Examples using service
+
+```sh
+  # Create new mysql-persistent service from service catalog.
+  odo service create mysql-persistent
+
+  # Delete service named 'mysql-persistent'
+  odo service delete mysql-persistent
+
+  # List all services in the application
+  odo service list
+
+
+```
+
+Perform service catalog operations
+
 ## storage
 
 `storage`