Adds a watch flag to the get command

The new flag fetch and display the request ressource and then continue
watching the ressource until timeout or cancellation.

A single ressource/ressource type is supported.

Signed-off-by: Soule BA <soule@weave.works>

cmd/flux/get_image.go

@@ -25,6 +25,9 @@ var getImageCmd = &cobra.Command{
 	Aliases: []string{"image"},
 	Short:   "Get image automation object status",
 	Long:    "The get image sub-commands print the status of image automation objects.",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return validateWatchOption(cmd, "images")
+	},
 }
 
 func init() {