Miepython

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* document normalization in docstrings
* add version and year to CITATION.cff
* remove 'v' from version numbers
* add github script and workflow to auto-update CITATION.cff
* add conda badge to readme
* clean up README.rst
* use svg images
* use a single tests/test_mie for jit and non-jit tests
* support ruff
* test python versions 3.7 to 3.12
* fix badges
* remove unused functions
* fix zenodo link

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* conda-forge fails because test files are not included

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* change tests to accommodate conda-forge
* require python>=3.9 to accommodate latest numba
* get rid of tox

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* fix scattering function for very small spheres

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* add mie_phase_matrix() to calculate scattering (Mueller) matrix

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* fix typo in README.rst that prevented pypi upload
* add CITATION.cff to base level of miepython repository