chore: add benchmarks for absolutize on clean absolute, dirty absolute, and relative paths

[hyf0]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 24 untouched benchmarks
🆕 5 new benchmarks
⏩ 1 skipped benchmark¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
🆕	absolutize_dirty_absolute	N/A	12.7 µs	N/A
🆕	absolutize_already_clean_absolute	N/A	24 µs	N/A
🆕	absolutize_relative_paths	N/A	15 µs	N/A
🆕	absolutize_with_relative_paths	N/A	12.1 µs	N/A
🆕	absolutize_with_already_clean_absolute	N/A	10.4 µs	N/A

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_{Comparing hyf_32842903844 (2c99d14) with main (28a3dd5)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩

[Copilot]

Pull request overview

This PR adds comprehensive benchmarks for the absolutize function to measure performance across different path types: clean absolute paths (expected zero-allocation fast path), relative paths (always allocates), and dirty absolute paths requiring normalization (always allocates).

Changes:

• Added two new fixture arrays (RELATIVE_CLEAN and DIRTY_ABSOLUTE) to support targeted benchmarking scenarios
• Extended benchmark suite with five new benchmark functions covering absolutize and absolutize_with methods across different path types

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
benches/fixtures.rs	Added RELATIVE_CLEAN and DIRTY_ABSOLUTE fixture arrays for benchmarking different path normalization scenarios
benches/absolutize.rs	Added benchmark functions for clean absolute, relative, and dirty absolute paths to measure performance characteristics

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