Fix SwiftCompileCaptureGroup Bug

[cpisciotta]

Fix a bug in the SwiftCompileCaptureGroup where it missed files with escaped spaces. Add a unit test that considers the previously missed output, and simplify the regex to more exhaustively consider filenames. As part of this change, update the regex's capturing groups, and use lastPathComponent to extract filename from the already captured filePath.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.88%. Comparing base (b674bbe) to head (f70c7f9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #306   +/-   ##
=======================================
  Coverage   86.87%   86.88%           
=======================================
  Files          14       14           
  Lines        1631     1632    +1     
=======================================
+ Hits         1417     1418    +1     
  Misses        214      214           

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