over in zarr-python, we have been pretty happy with our dev environment. I am wondering if we should bring those benefits over to numcodecs. Specifically, we would make the following changes:

• use hatch for packaging
• use the same linting / pre-commit configuration as zarr-python
• use a src/numcodecs layout instead of numcodecs

Does anyone object to this proposal? I think it will generally improve the dev experience.