fix: resolve Windows case sensitivity with -C option (#8510)

[harshrajdubey]

Fix Windows case sensitivity issue with npm query -C option

This PR resolves a critical Windows compatibility issue where npm query .workspace -C "path" fails when the specified path has different case than the actual filesystem path. The issue affects both drive letter case (C: vs c:) and folder name case (CLI vs cli).

What this fixes:

• Drive letter normalization: Ensures npm query .workspace -C "c:\project" works the same as npm query .workspace -C "C:\project"
• Folder name case handling: Makes npm query .workspace -C "d:\hrd\CLI" work when the actual folder is named cli
• Workspace selector matching: The :path() selector now performs case-insensitive matching on Windows
• Cache key consistency: Arborist cache keys are now case-insensitive on Windows to prevent cache misses

How it works:

1. Config validation layer: Drive letters are normalized to uppercase in workspaces/config/lib/type-defs.js
2. Path comparison layer: Relative path calculations use case-insensitive comparison in workspaces/arborist/lib/relpath.js
3. Query selector layer: The :path() pseudo-selector handles Windows case sensitivity in workspaces/arborist/lib/query-selector-all.js
4. Cache management layer: Smart cache key generation with filesystem fallback in workspaces/arborist/lib/arborist/load-actual.js

Testing:

• All existing tests pass (102 suites, 4807 assertions)
• 100% code coverage maintained
• Manual testing confirms all case variations work correctly

References

Fixes #8510