Migrate from scikit-build to scikit-build-core

[nightlark]

Try migrating from scikit-build to scikit-build-core, which could remove the need for setup.py and MANIFEST.in files.

scikit-build/scikit-build-core#274 (comment) mentions an additional step that is needed for using setuptools_scm for versioning.

One unknown issue (that works with setuptools specifies data/share/swig subfolder in setup.py but not in pyproject.toml) is whether or not those swig support files that get installed will be included in the correct subfolder when building using scikit-build-core.