Migrate all remaining home-manager modules from home/modules/ to home/roles/
to establish a unified role-based configuration pattern. This completes the
migration started in Phase 1.
Changes:
- Phase 1-3: Migrated tmux, plasma-manager, kubectl, and emacs to roles
- Phase 4: Migrated aerospace with custom options under home.roles.aerospace.*
- Phase 5: Migrated i3+sway with shared config and override options
- Phase 6: Removed empty home/modules/ directory
All home configs now import only ./roles with role-based enable options.
Updated flake.nix machine-specific overrides to use new namespaces.
Verified with nix flake check - all configurations build successfully.
