Add benchmark code for URL parser

[rmisev]

• Add benchmark code bench-url.cpp
• Update scripts to download nanobench.h
• Run benchmark in macOS workflow

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4c5c326) 99.72% compared to head (0815de6) 99.72%.

❗ Current head 0815de6 differs from pull request most recent head db24212. Consider uploading reports for the commit db24212 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #24   +/-   ##
=======================================
  Coverage   99.72%   99.72%           
=======================================
  Files          15       15           
  Lines        2217     2217           
=======================================
  Hits         2211     2211           
  Misses          6        6           

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