Include int steps

[dehume]

Include the different iterations of the final project to make it easier to take screenshots for lessons before the final completed project.

[dehume]

Could also put all these different Definitions behind an env variable or something. Trying to think of how to make this more elegant.

[cmpadden]

Include the different iterations of the final project to make it easier to take screenshots for lessons before the final completed project.

This repo is provided as an example completed project in the course. Would that be a problem if we make these changes?

docs/dagster-university/pages/dagster-essentials/lesson-1/project-preview.md
18:If you get stuck or want to jump ahead, check out the [finished project here on GitHub](https://github.com/dagster-io/project-dagster-university).

docs/content/concepts/assets/asset-selection-syntax.mdx
129:To demonstrate how to use the asset selection syntax, we'll use the following asset graph from the [Dagster University Essentials project](https://github.com/dagster-io/project-dagster-university):

Maybe we would need to update the course content with an explanation, or improve the readme?