Changed: Don't use custom join in GamePathNode & Update Paths Library

[Sewer56]

Avoids custom logic for path creation.
Ticks off a box in

• Mod Contents file tree view Refinements #1048

This is set as 'draft' because waiting for Paths PR merges & NuGet

[erri120]

What's blocking this?

[Sewer56]

I just wanted to update paths lib on this branch while I was at it. Nothing else really.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.95%. Comparing base (5c4ef18) to head (d599ac8).
Report is 199 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1067      +/-   ##
==========================================
- Coverage   54.82%   53.95%   -0.87%     
==========================================
  Files         662      673      +11     
  Lines       21997    22348     +351     
  Branches     1717     1715       -2     
==========================================
- Hits        12059    12057       -2     
- Misses       9541     9896     +355     
+ Partials      397      395       -2     

Flag	Coverage Δ
Linux	53.29% <100.00%> (-0.85%)	⬇️
Windows	53.20% <100.00%> (-0.86%)	⬇️
clean_environment_tests	53.94% <100.00%> (-0.87%)	⬇️
macOS	52.76% <100.00%> (-0.84%)	⬇️

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Files	Coverage Δ
...ds.Abstractions.GameLocators/Trees/GamePathNode.cs	95.08% <100.00%> (-0.08%)	⬇️
....Games.RedEngine/ModInstallers/AppearancePreset.cs	89.47% <100.00%> (ø)

... and 83 files with indirect coverage changes