Experimental - switch pybind11 -> nanobind

[virgesmith]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 90.78947% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.56%. Comparing base (7cd9ec4) to head (bec0c93).

Files with missing lines	Patch %	Lines
src/module.cpp	90.78%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           main      #60       +/-   ##
=========================================
+ Coverage      0   94.56%   +94.56%     
=========================================
  Files         0       26       +26     
  Lines         0     1049     +1049     
=========================================
+ Hits          0      992      +992     
- Misses        0       57       +57     

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