Switch PyPartMC's binding system from pybind11 to nanobind

[Griger5]

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[slayoo]

thank you @Griger5 !

[slayoo]

This PR:

• makes #414 obsolete
• addresses #403
• potentially helps with:
  • #368,
  • #348,
  • #334,
  • #213
  • #99
  • #413

[slayoo]

The Matlab build fails with:

  Cannot find class 'py.nanobind.nb_type_0'.

should we ask at nanobind discussions? (referencing https://github.com/wjakob/nanobind/discussions/439)

[slayoo]

BTW, the only place where Google indexed seemingly identical error as we have in the codecov build is here: https://github.com/nvidia-isaac/nvblox/issues/73

[codecov-commenter]

Codecov Report

:x: Patch coverage is 95.50562% with 4 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 90.38%. Comparing base (1da8001) to head (8d62e78). :warning: Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pypartmc.cpp	94.59%	4 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #431      +/-   ##
==========================================
- Coverage   90.76%   90.38%   -0.38%     
==========================================
  Files          55       55              
  Lines        2491     2455      -36     
  Branches      135      139       +4     
==========================================
- Hits         2261     2219      -42     
- Misses        158      163       +5     
- Partials       72       73       +1     

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