feat(nix): Implement nix-home-manager-check hook

[aRustyDev]

Description

Implement a pre-commit hook for testing home-manager configurations.

Requirements

• Validate home.nix and home-manager module files
• Support home-manager build with dry-run
• Handle both standalone and NixOS/darwin module usage
• Support flake-based home-manager configurations
• Clear error reporting for configuration errors

Implementation Details

• Location: hooks/nix/nix-home-manager-check.sh
• Language: bash script
• File patterns: home.nix, home-manager/*.nix, users/*.nix

Testing

• Test with valid home configuration
• Test with invalid home-manager options
• Test with missing programs/services
• Test with both flake and legacy setups
• Test module imports and dependencies

Configuration in .pre-commit-hooks.yaml

- id: nix-home-manager-check
  name: Check home-manager configuration
  description: Validates home-manager configurations
  entry: hooks/nix/nix-home-manager-check.sh
  language: script
  files: (home|users/.*|home-manager/.*)\.nix$