Remove file_path_format::detect

[rmisev]

Use file_path_format::native as default in the url_from_file_path function.

The path format detection algorithm was simple: if the first path character is /, then it is POSIX format, otherwise - Windows.
But in some cases it is ambiguous, e.g. path //h\sn\p is recognized as POSIX path, but it can also be Windows UNC path, because / is allowed as directory separator in Windows paths.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7842b29) 99.74% compared to head (c3026b1) 99.74%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
- Coverage   99.74%   99.74%   -0.01%     
==========================================
  Files          16       16              
  Lines        2326     2321       -5     
==========================================
- Hits         2320     2315       -5     
  Misses          6        6              

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