Build, test, and debug regular expressions
Matches Windows file paths for AutoCAD .dwg drawings starting with 'C:\Box\Triton Clark Build\Hull 718\718 ~ ', requiring at least one more subdirectory level (a literal backslash) and '939-' in the filename before the .dwg extension. A negative lookahead excludes any path containing 'rchive' (Archive folders), 'scaled_', or 'Venues'. Used with gm flags to filter rack drawing files line-by-line, skipping archived, scaled, or venue-specific drawings.