v2.9.0 Add-ToPath removes folders that don't exist - Add-ToPath updated to make it better

[2.9.0] - 2026_001_026_005_033_037_America_slash_New_York

Added

• Add-ToPath Enhancement:
  • Added logic to automatically prune/delete folders from the system PATH that no longer exist on the local disk.
  • Implemented deduplication to remove redundant entries during the update process.

Changed

• Refactored Add-ToPath internal variables and method parameters to use snake_case naming convention (e.g., $path_to_add, $abs_path, $reg_key_path).
• Updated the Add-Type mechanism to use dynamic naming, preventing "Type already exists" errors when re-defining the function in a single PowerShell session.