Enhance deploy workflow by human action

[StrongMonkey]

Fleet has the ability to pause bundle deploy, so user can temporarily pause the bundle until they want to enable it to trigger the deploy action. This has been the case for other gitops tools like argo-cd, which git sync is happen periodically, the deploy button must be triggered manually by human as it is kind of scary to automatically deploy when git is changed. Today fleet automatically deploy changes when git is changed.

We need to think about this:

Is it possible for us to adopt the workflow so that user has to manually trigger the deploy button in order to changes from git to be reflected to git repo? we can still enable auto-sync if user wants. But we need to think about which model is better by default.