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

core/system/options.nix

@@ -0,0 +1,55 @@
+{ lib, ... }:
+
+{
+  options.nomarchy.system = {
+    dns = lib.mkOption {
+      type = lib.types.enum [ "Cloudflare" "Google" "DHCP" "Custom" ];
+      default = "DHCP";
+      description = "Selected DNS provider.";
+    };
+    customDns = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [];
+      description = "List of custom DNS servers.";
+    };
+    wifi = {
+      powersave = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = "Whether to enable wifi power saving.";
+      };
+    };
+    timezone = lib.mkOption {
+      type = lib.types.str;
+      default = "UTC";
+      description = "System timezone.";
+    };
+    features = {
+      fingerprint = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Whether to enable fingerprint support.";
+      };
+      fido2 = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Whether to enable FIDO2 support.";
+      };
+      hybridGPU = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Whether to enable hybrid GPU support (supergfxd).";
+      };
+      makima = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Whether to enable makima key remapper.";
+      };
+    };
+    theme = lib.mkOption {
+      type = lib.types.str;
+      default = "nord";
+      description = "Selected system theme.";
+    };
+  };
+}