zizmor-bug-726

This repo exists solely to provide a repro case for zizmor#726.

Behavior: zizmor should collect all the workflows and actions defined in this repository, even the ones defined in wonky places:

• .github/workflows/hello.yml is a normal workflow defined in the normal place.
• arbitrary/subdir/.github/workflows/hello.yml is a normal workflow defined in a arbitrary subdirectory. GitHub Actions won't find and run this workflow, but zizmor collects it (on the theory that the user might be generating workflows for use elsewhere, and they want us to scan them).
• arbitrary/subdir/custom-action/action.yml is a normal action definition defined in the normal way.
• .github/actions/custom-action/action.yml is a normal action definition, within the .github directory. GitHub Actions accepts this, so we should too.
• .github/workflows/custom-action/action.yml is a normal action definition, but defined as a subdirectory of the workflows directory. GitHub Actions accepts this, so we should too.
• .github/workflows/actions/custom-action/action.yml is a normal action definition, but defined within a nested subdirectory of the workflows directory. GitHub Actions accepts this, so we should too.