Disallow dot-dot segments in the path argument of url_from_file_path

[rmisev]

To deal with dot-dot segments, it is recommended to use a special OS function to normalize the path before passing it to the upa::url_from_file_path function. Normalization can be done using the POSIX realpath function, the Windows GetFullPathName function, or, if you are using C++17, the std::filesystem::canonical function.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (347fc4c) 99.73% compared to head (18bfb3b) 99.74%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #36   +/-   ##
=======================================
  Coverage   99.73%   99.74%           
=======================================
  Files          16       16           
  Lines        2305     2326   +21     
=======================================
+ Hits         2299     2320   +21     
  Misses          6        6           

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