Depends on https://github.com/orgs/coder/projects/41/views/1?pane=issue&itemId=94820346 and https://github.com/orgs/coder/projects/41/views/1?pane=issue&itemId=94820346

Update the UI to watch for "devcontainer files changed" messages. Upon receipt of this event, provide an option to the user to rebuild the container. This will translate to running a stop followed by a start.