feat(fs/unstable): add statSync and lstatSync

[kt3k]

This PR adds unstable statSync and lstatSync to @std/fs

towards #6255

[codecov]

Codecov Report

Attention: Patch coverage is 47.22222% with 19 lines in your changes missing coverage. Please review.

Project coverage is 96.31%. Comparing base (d02d714) to head (6cbb389).
Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
fs/unstable_lstat.ts	50.00%	8 Missing ⚠️
fs/unstable_stat.ts	50.00%	8 Missing ⚠️
fs/_utils.ts	25.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6300      +/-   ##
==========================================
- Coverage   96.34%   96.31%   -0.03%     
==========================================
  Files         547      547              
  Lines       41667    41691      +24     
  Branches     6314     6316       +2     
==========================================
+ Hits        40144    40156      +12     
- Misses       1481     1493      +12     
  Partials       42       42              

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[bartlomieju]

LGTM, no comments