Fix ls output for files and make ls respect NO_COLOR

[skepppy]

Calling ls -l on a file currently just prints that the provided file is indeed a file. This change makes ls -l print the file information, just like you would see when calling ls -l on the directory the file is in. Also, this change makes ls respect the NO_COLOR environment variable, which wasn't the case before.

Print file information when calling ls -l on a file and also take into account the NO_COLOR environment variable for ls output.

Closes #1514 and #1044.

[codspeed-hq]

Merging this PR will not alter performance

✅ 11 untouched benchmarks

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_{Comparing skepppy:fix/target-shell-ls (117c1aa) with main (ab0db26)}

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.77%. Comparing base (ab0db26) to head (117c1aa).

Files with missing lines	Patch %	Lines
dissect/target/tools/shell.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1515      +/-   ##
==========================================
+ Coverage   80.75%   80.77%   +0.02%     
==========================================
  Files         396      396              
  Lines       34744    34745       +1     
==========================================
+ Hits        28057    28065       +8     
+ Misses       6687     6680       -7     

Flag	Coverage Δ
unittests	80.77% <80.00%> (+0.02%)	⬆️

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