Add ls parameters to target-fs

[DevJoost]

Add ls -ah functionality to target-fs

Mainly based it on the target-shell implementation. Also added -h (human readable) implementation that is missing in target-shell.

Resolves #626

[pyrco]

Nice addition, 2 very small things, but otherwise lgtm.

[codecov]

Codecov Report

Attention: Patch coverage is 15.15152% with 56 lines in your changes missing coverage. Please review.

Project coverage is 75.23%. Comparing base (ced08e4) to head (5b80277).

Files	Patch %	Lines
dissect/target/tools/fs.py	15.15%	56 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #716      +/-   ##
==========================================
- Coverage   75.37%   75.23%   -0.14%     
==========================================
  Files         296      296              
  Lines       25503    25556      +53     
==========================================
+ Hits        19223    19228       +5     
- Misses       6280     6328      +48     

Flag	Coverage Δ
unittests	75.23% <15.15%> (-0.14%)	⬇️

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