feat: add new api to create a OutputInfo

[Decodetalkers]

Sometime we just want to screenshot a single screen, so this time we just need a WlOutput, and a transform. So I think making a way to create one manually is needed

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 8.31%. Comparing base (8950973) to head (cdcd902).

Files with missing lines	Patch %	Lines
libwayshot/src/output.rs	0.00%	14 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #419      +/-   ##
========================================
- Coverage   8.35%   8.31%   -0.04%     
========================================
  Files         19      19              
  Lines       2944    2958      +14     
========================================
  Hits         246     246              
- Misses      2698    2712      +14     

Flag	Coverage Δ
libwayshot	11.82% <0.00%> (-0.09%)	⬇️
wayshot	0.00% <ø> (ø)

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