Extruder regions

[lnevay]

New function for extruder.

[codecov]

Codecov Report

Attention: Patch coverage is 37.50000% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 70.91%. Comparing base (b3639b4) to head (c6b7bbb).

❗ Current head c6b7bbb differs from pull request most recent head 2a163ba. Consider uploading reports for the commit 2a163ba to get more accurate results

Files	Patch %	Lines
src/pyg4ometry/fluka/extruder.py	37.50%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #156      +/-   ##
==========================================
- Coverage   70.94%   70.91%   -0.03%     
==========================================
  Files         144      144              
  Lines       22390    22403      +13     
==========================================
+ Hits        15884    15887       +3     
- Misses       6506     6516      +10     

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