Add methods for the borehole

[tdixon97]

This adds a function to check if a point is inside the HPGe borehole, this is useful for primary generation and for post processing.
It did reveal however that some of the geometry methods for signed distances are a bit unstable... this should handle the case of convex corners in the geometry (< 90 deg), but not the case of concave (< 90 deg).

We should maybe add these checks in future and try to make all this geometry code more robust (@ggmarshall ?)

[ManuelHu]

we did not require awkward in this package before

[codecov]

Codecov Report

Attention: Patch coverage is 75.55556% with 11 lines in your changes missing coverage. Please review.

Project coverage is 69.96%. Comparing base (13f0047) to head (6a7fc4a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/legendhpges/invcoax.py	79.06%	9 Missing ⚠️
src/legendhpges/utils.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #78      +/-   ##
==========================================
+ Coverage   69.59%   69.96%   +0.37%     
==========================================
  Files          15       15              
  Lines         865      909      +44     
==========================================
+ Hits          602      636      +34     
- Misses        263      273      +10     

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