Simplify scaffold project with option to exclude files from the template

[dbrtly]

What's the use case?

Starting with PEP 621 - Storing project metadata in pyproject.toml, the Python community selected pyproject.toml as a standard way of specifying project metadata. Setuptools has adopted this standard and will use the information contained in this file as an input in the build process.

The scaffold project includes pyproject.toml, setup.cfg and setup.py.
All the data in setup.cfg and setup.py can be configured in pyproject.toml.
For the quickstart, most of it is already configured in pyproject.toml.

PEP621 was formally accepted in Nov 2020.

A scaffold template with two fewer files would be simpler for new users getting started with dagster.
Have extended the idea to generically skip files from the template to enable

dagster project scaffold quickstart --skip-files setup* --skip-files test

For the record, as a matter of taste, I prefer:
dagster project scaffold quickstart --exclude setup* --exclude test

Ideas of implementation

see PR #25245

Additional information

I would like to make the code contribution

Message from the maintainers

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