Workflow to test generated minimal package

[suvayu]

Related issues

Checks:

• [x] Running the tests should work
• [x] Building the docs should work
• [ ] Lint check of the generated package

Closes #277

Checklist

• [x] I am following the contributing guidelines
• [x] Tests are passing
• [x] Lint workflow is passing
• [x] Docs were updated and workflow is passing
• [ ] CHANGELOG.md was updated

[suvayu]

I think something is off with the CI: https://github.com/suvayu/COPIERTemplate.jl/actions, locally tests passed.