Deploy from VS Code (or any external editor)

As you explained here: https://discuss.appstudio.dev/t/edit-and-run-in-visual-studio/3630/2

NSB will ignore any changes made outside of the IDE – you have to quit NSB and relaunch for the changes to be recognized.

With the goal of shortening the edit/deploy/test/edit cycle, I want to remove the time to relaunch NSB each time external changes are made.