Investigate pyo3 importlib feature for linking on Windows

Recent versions of pyo3 are able to generate an import library on Windows without a Python distribution present. This enables you to cross-compile more easily. It also likely makes builds less brittle since they aren't as dependent on a Python interpreter being available.

We should investigate using this feature or rolling a similar solution ourselves in order to facilitate more turnkey building/linking on Windows.

Start by reviewing PyO3's importlib feature and the current Windows build and linking path. Compare using that feature with rolling a similar solution, focusing on cross-compilation and builds without a Python distribution. Done means a decided implementation direction for more turnkey Windows building and linking; no files or tests are named in the issue.

Written by the indexing model from the issue text.