An example of using a premade component in a registry (ghcr)

[macovedj]

In the Docs SIG today there was a discussion about how to simplify the tutorial to make the sections on composition easier to understand. One point that was brought up is that rather than having users author a dependency (adder component in the calculator example), it would be nice if there were also an example of using registry tools to fetch a premade dependency when composing components.

Perhaps we could start with publishing the adder component to ghcr and consuming it in an example?