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/idle.nix

@@ -0,0 +1,36 @@
+{ config, lib, ... }:
+
+{
+  services.hypridle = {
+    enable = lib.mkDefault config.nomarchy.toggles.idle;
+    settings = lib.mkDefault {
+      general = {
+        lock_cmd = "nomarchy-lock-screen";
+        before_sleep_cmd = "loginctl lock-session";
+        after_sleep_cmd = "sleep 1 && hyprctl dispatch dpms on";
+        inhibit_sleep = 3;
+      };
+
+      listener = [
+        {
+          timeout = 150;
+          on-timeout = "pidof hyprlock || nomarchy-launch-screensaver";
+        }
+        {
+          timeout = 151;
+          on-timeout = "loginctl lock-session";
+        }
+        {
+          timeout = 330;
+          on-timeout = "brightnessctl -sd '*::kbd_backlight' set 0";
+          on-resume = "brightnessctl -rd '*::kbd_backlight'";
+        }
+        {
+          timeout = 330;
+          on-timeout = "hyprctl dispatch dpms off";
+          on-resume = "hyprctl dispatch dpms on && brightnessctl -r";
+        }
+      ];
+    };
+  };
+}