fix node/npm/pnpm detection

[bigcat88]

Addition to #314

Correct handling of the FileNotFoundError error with information about a specific failure displayed on the screen.

Also added information about the exact version of node/npm/pnpn used.

[codecov]

Codecov Report

❌ Patch coverage is 72.05882% with 19 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
comfy_cli/command/install.py	72.05%	19 Missing ⚠️

@@            Coverage Diff             @@
##             main     #316      +/-   ##
==========================================
- Coverage   50.63%   50.61%   -0.02%     
==========================================
  Files          32       32              
  Lines        3405     3432      +27     
==========================================
+ Hits         1724     1737      +13     
- Misses       1681     1695      +14     

Files with missing lines	Coverage Δ
comfy_cli/command/install.py	57.67% <72.05%> (-0.60%)	⬇️

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