Example showing how to deal with mix of local/git files

Sometimes there are files locally you might want to have on the runner that don't exist on GitHub, but you have locally or as temp files uploaded to an app of yours.

In these cases, we can just run `fuego.run`, then, using the `space_id` and `dataset_id` generated from `fuego`, you can just push these files up right away, as it'll restart the build before running.

Should show an example of this workflow because I bet it would be a common pattern.

Locate the existing documentation or examples for fuego.run and review how space_id and dataset_id are exposed. Add a focused example showing local or temporary files being uploaded after the initial run, and confirm the documented workflow matches the restart behavior described in the issue.

Written by the indexing model from the issue text.