pyproject updates

• Renames the PyPI package from constellation to ConstellationDAQ (does not rename Python package)
  The constellation package is already taken, and using e.g. pip-review -a to update all packages removes our package to install the PyPI one - so let's already rename it now. I went with ConstellationDAQ for now, but we can discuss if we want something else.
• Removes the keywords field: I didn't see any other package use it and I don't think it works on PyPI anyway. Instead I opened a PR to add a DAQ classifier here.
• Update from Planning to Alpha stage, update description, remove Python 3.10 classifier