Wait until the site is ready for a default timeout of 30 seconds, if the site is not ready by then, let the user know to check the site status command to see when the site is ready to use. 

Add the `–wait` flag to the following commands:

• skupper site create (pending, configured, ready)
• skupper site update (pending, configured, ready)
• skupper site delete (boolean)
• skupper listener create (pending, configured, ready)
• skupper listener update (pending, configured, ready)
• skupper listener delete (boolean)
• skupper connector create (pending, configured, ready)
• skupper connector update (pending, configured, ready)
• skupper connector delete (boolean)
• skupper link update (pending, configured, ready)
• skupper link delete (boolean)