feat: separate commands into groups (#2861)

Author: quantumsheep

cmd/scw/testdata/test-all-usage-account-ssh-key-add-usage.golden

@@ -12,8 +12,12 @@ AVAILABLE COMMANDS:
   list        List all servers
   reboot      Reboot a server
   reinstall   Reinstall a server
-  ssh         SSH into a server
   update      Update a server
+
+UTILITY COMMANDS:
+  ssh         SSH into a server
+
+WORKFLOW COMMANDS:
   wait        Wait for a server to reach a stable state
 
 FLAGS:

cmd/scw/testdata/test-all-usage-account-ssh-key-get-usage.golden

@@ -15,6 +15,8 @@ AVAILABLE COMMANDS:
   start       Start an elastic metal server
   stop        Stop an elastic metal server
   update      Update an elastic metal server
+
+WORKFLOW COMMANDS:
   wait        Wait for a server to reach a stable state (delivery and installation)
 
 FLAGS: