Convert parser to Cython

[Vlek]

Attempt to increase the speed of the script by converting the underlying parser/evaluator to Citron for a hopefully decent speed boost. Current tests take ~0.50ms to complete. I wonder if I can halve that time.

[Vlek]

Did some research.

Here are a few good sources for information:
python-poetry/poetry#137
python-poetry/poetry#11
https://stackoverflow.com/questions/63679315/how-to-use-cython-with-poetry

Examples for current usage of build.py:
https://github.com/zoj613/htnorm/blob/main/build.py
https://github.com/ADicksonLab/geomm/blob/v0.1.7/build.py

[Vlek]

I think we should take a good look at our speed and memory usage statistics in our speed metric tests in #41 and really consider whether this is the bottleneck. I believe that it is pretty fair to say that this begins to become a bottleneck when it's the case that we have thousands of dice rolls, but with regular usage it is unlikely to be the case.