Add confirmation step to the Deploy wizard

Deploying a SAM Application takes the user through a series of inputs, then proceeds to deploy. The user does not have any indication that they have reached the end of the wizard before the deploy starts, or an opportunity to review the action before proceeding.

Acceptance criteria:
* a final wizard step presents all of the options the user input during the wizard
* user is able to confirm or cancel the wizard on this step
* confirm runs the deploy
* cancel exits the wizard
* user is able to step back to the previous stage in the wizard (just like the other stages)

Things to consider:
* maybe the user can select an option to change it, returning them back to that stage in the wizard

Start by locating the SAM Application Deploy wizard entry point and tracing its existing stages and navigation. Review how the wizard stores each user input, then define the final review step with confirm, cancel, and back behavior; done means all selected options are shown and each action behaves as described in the acceptance criteria.

Written by the indexing model from the issue text.