perf(fmt): avoid absolute path joins in gitignore matching - #245
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Nested
.gitignorematching currently rebuilds absolute directory paths for every path segment during formatter discovery. This indexes matchers by root-relative POSIX paths instead, preserving nested override semantics while avoiding repeatedpath.join()work. Across 50 interleaved warm-cache Rspack runs per variant, medianrs fmt --checktime decreased from 410.78 ms to 390.95 ms (4.83%).