Drive a run entirely from runtime configuration (No Stack required!)

Similar to how GitHub Actions and Gitlab-CI work, I would really like to just write the expected stack config in the source code config, and have the runner execute it. Eliminate the need to create and manage Stacks as separate entities entirely!

The runtime configuration is kinda halfway there already. We can drive Stack behavior from source code. But we still have to separately create the Stack first. Why? Let’s remove that limitation, and just drive the run entirely from source.