add first attempt at python library

[phlptp]

add a few updates including cmake and a first cut at a python wrapper using nanobind

[SimonHeybrock]

Interesting development!

Wondering what your plans are regarding errors? In Scipp we are translating the "error codes" of this library into exceptions, which is more in line with how most Python software operates.

[phlptp]

Interesting development!

Wondering what your plans are regarding errors? In Scipp we are translating the "error codes" of this library into exceptions, which is more in line with how most Python software operates.

Not entirely sure yet, this is more of an experiment at the moment. As we get further along we may borrow what you are doing with Scipp

[phlptp]

@SimonHeybrock I am going to mimic the C++ library for now and not handle exceptions, that may or may not be how we want to have things work longer term. The simplest approach may be to add a check for error units wherever there is a string translation. But for a first try I am not doing that.