Use CoreText run font fallback for glyph paths

[Weixi779]

Closes #109

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.48%. Comparing base (17d55c1) to head (3fbf694).

Files with missing lines	Patch %	Lines
SwiftDraw/Sources/Utilities/CGPath+Segment.swift	80.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #110   +/-   ##
=======================================
  Coverage   88.48%   88.48%           
=======================================
  Files         148      148           
  Lines        9966     9975    +9     
=======================================
+ Hits         8818     8826    +8     
- Misses       1148     1149    +1     

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