refactor: implement component-based architecture for enhanced maintainability

- Reorganize directory structure into core/, features/, and themes/
- Colocate application Nix logic, configs, scripts, and theme overrides
- Implement 'Inversion of Control' for theming: apps now pull theme-specific layouts
- Update flake.nix and shared library paths to match the new structure
- Document the new Feature-Centric architecture in README.md

features/desktop/scripts/nomarchy-hyprland-window-close-all

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# Close all open windows
+hyprctl clients -j | \
+  jq -r ".[].address" | \
+  xargs -I{} hyprctl dispatch closewindow address:{}
+
+# Move to first workspace
+hyprctl dispatch workspace 1