Display list of commands from the local devfile in odo describe component output (#6944)

* Add integration tests highlighting the expectations

* Add and fill a 'Commands' field from the DevfileData struct returned by `describe`

* Display commands in the human-readable output of 'odo describe'

* Add documentation and sample outputs

pkg/registry/registry.go

@@ -445,5 +445,10 @@ func (o RegistryClient) retrieveDevfileDataFromRegistry(ctx context.Context, reg
 
 	// Convert DevfileObj to DevfileData
 	// use api.GetDevfileData to get supported features
-	return *api.GetDevfileData(devfileObj), nil
+	devfileData, err := api.GetDevfileData(devfileObj)
+	if err != nil {
+		return api.DevfileData{}, err
+	}
+
+	return *devfileData, nil
 }