As a Shipwright developer, I want to ensure tutorials cover most scenarios on how to use Shipwright

[qu1queee]

Idea:

Adding this for the record (there might be already a similar issue). With the introduction of tutorials, we should extend the list to cover:

• Building an image from a private git repository. Note: We might have this already, but we should consolidate this under tutorials.
• Building an image with Buildah.
• Building an image with Buildpacks-v3-heroku.
• Building an image with source-to-image
• Building an image with TTL/Limits.
• Building an image with a one-off Build.
• Introduce at least an initial tutorial on how to write a custom Cluster/BuildStrategy. This will get easier, once the implementation of https://github.com/shipwright-io/build/pull/697 is in place.

Please provide further ideas if possible.