feat: add library flag for all ns filtering

[jahvon]

Summary

By default only show executables in the root namespace with options to show all namespaces. Includes improvements for ref displays in the library view.

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Other (please describe):

[codecov]

Codecov Report

Attention: Patch coverage is 9.80392% with 46 lines in your changes missing coverage. Please review.

Project coverage is 36.17%. Comparing base (29daebf) to head (2854f5f).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/internal/library.go	11.11%	16 Missing ⚠️
types/executable/ref.go	0.00%	9 Missing ⚠️
internal/io/library/styles.go	0.00%	7 Missing ⚠️
internal/io/library/view.go	0.00%	6 Missing ⚠️
tests/utils/sub_execs.go	0.00%	4 Missing ⚠️
internal/io/library/init.go	0.00%	3 Missing ⚠️
types/executable/executable.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #164      +/-   ##
==========================================
- Coverage   36.41%   36.17%   -0.24%     
==========================================
  Files          81       81              
  Lines        5682     5705      +23     
==========================================
- Hits         2069     2064       -5     
- Misses       3207     3236      +29     
+ Partials      406      405       -1     

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