feat(fs/unstable): add fs.lstat

[IgorM867]

This PR adds lstat API to @std/fs.

towards #6255

[codecov]

Codecov Report

Attention: Patch coverage is 52.63158% with 9 lines in your changes missing coverage. Please review.

Project coverage is 96.32%. Comparing base (8573618) to head (01dc944).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
fs/unstable_lstat.ts	52.63%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6276      +/-   ##
==========================================
- Coverage   96.34%   96.32%   -0.02%     
==========================================
  Files         543      544       +1     
  Lines       41601    41620      +19     
  Branches     6312     6313       +1     
==========================================
+ Hits        40079    40091      +12     
- Misses       1478     1486       +8     
+ Partials       44       43       -1     

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[kt3k]

LGTM! Thanks!