Try cython

[vatai]

• Create pyproject.toml and setup.py docs SX
• Try getting std::vector and std::string out of C++ code into python (list if possible) docs
• implement it

[vatai]

I'll leave this here. Maybe things are doable because to use C/C++ objects (such as isl_* objects) you just need to do something like

cdef struct isl_set:
  pass # or declare the member used in the cython code

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So in theory the ctadashi part might be converted to a nicer/simpler cython implementation.