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/apps/makima.nix

@@ -0,0 +1,25 @@
+{ config, pkgs, lib, ... }:
+
+let
+  cfg = config.nomarchy.system.features.makima;
+in
+{
+  config = lib.mkIf cfg {
+    # If the user has makima-bin available in their overlays (as they originally used a custom package),
+    # this will install it. Otherwise, it will fail evaluation if not available in nixpkgs.
+    environment.systemPackages = [ pkgs.makima-bin ];
+
+    environment.etc."makima/AT Translated Set 2 keyboard.toml".source = ../../assets/makima + "/AT Translated Set 2 keyboard.toml";
+
+    systemd.services.makima = {
+      description = "Makima key remapping service";
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        User = config.services.displayManager.autoLogin.user;
+        Environment = "MAKIMA_CONFIG=/etc/makima";
+        ExecStart = "${pkgs.makima-bin}/bin/makima";
+        Restart = "on-failure";
+      };
+    };
+  };
+}