message: docs(gitpod-cli): add gp top command
diff: @@ -31,6 +31,7 @@ Available Commands:
  sync-await Awaits an event triggered using gp sync-done
  sync-done Notifies the corresponding gp sync-await calls that this event has happened
  tasks Interact with workspace tasks
  + top Display workspace resource (CPU and memory usage)
  url Prints the URL of this workspace
  version Prints the version of the CLI
  @@ -161,3 +162,7 @@ Outputs a table-formatted list of ports along with their status, URL, name and d
  ```sh
  gp ports list
  ```
  +
  +### top
  +
  +Displays the used and available workspace CPU and memory.
  