feat: Added support for MorphIO options and fixed single point branches in NEURON builder

[Helveg]

fixes #205

Tasks

• Added tests
• Updated documentation

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📚 Documentation preview 📚: https://nrn-patch--210.org.readthedocs.build/en/210/

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📚 Documentation preview 📚: https://arborize--210.org.readthedocs.build/en/210/

[codecov]

Codecov Report

❌ Patch coverage is 97.61905% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.78%. Comparing base (715b59e) to head (a5f868e).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
libs/arborize/arborize/builders/_neuron.py	97.36%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #210      +/-   ##
==========================================
- Coverage   78.58%   77.78%   -0.81%     
==========================================
  Files         196       23     -173     
  Lines       18085     2021   -16064     
  Branches     2125      252    -1873     
==========================================
- Hits        14213     1572   -12641     
+ Misses       3317      381    -2936     
+ Partials      555       68     -487     

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[Helveg]

@danielelinaro Please have a look whether the new neuron_build builds the granule cell morphology without single point sections :)

[danielelinaro]

@Helveg everything seems to be working fine, thanks for the fix!

[filimarc]

LGTM

[drodarie]

LGTM. Maybe test the small snippet of code not covered by unittests.