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-single-square-aspect-toggle

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Check current single_window_aspect_ratio setting
+CURRENT_VALUE=$(hyprctl getoption "layout:single_window_aspect_ratio" 2>/dev/null | head -1)
+
+# Parse vec2 output: "vec2: [1, 1]" or "vec2: [0, 0]"
+if [[ $CURRENT_VALUE == *"[1, 1]"* ]]; then
+  hyprctl keyword layout:single_window_aspect_ratio "0 0"
+  notify-send -u low "    Disable single-window square aspect ratio"
+else
+  hyprctl keyword layout:single_window_aspect_ratio "1 1"
+  notify-send -u low "    Enable single-window square aspect"
+fi