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/waybar/default.nix

@@ -0,0 +1,32 @@
+{ config, pkgs, lib, ... }:
+
+let
+  activeTheme = config.nomarchy.theme;
+  
+  # Path to local theme files
+  themeDir = ./themes + "/${activeTheme}";
+  hasThemeConfig = builtins.pathExists (themeDir + "/config.jsonc");
+  hasThemeStyle = builtins.pathExists (themeDir + "/style.css");
+  
+  # Default fallback files
+  defaultConfig = ./config/config.jsonc;
+  defaultStyle = ./config/style.css;
+  
+  # Selected files
+  configFile = if hasThemeConfig then (themeDir + "/config.jsonc") else defaultConfig;
+  styleFile = if hasThemeStyle then (themeDir + "/style.css") else defaultStyle;
+  
+in
+{
+  programs.waybar = {
+    enable = lib.mkDefault true;
+    systemd.enable = lib.mkDefault true;
+    
+    settings = lib.mkDefault [ (builtins.fromJSON (builtins.readFile configFile)) ];
+    style = lib.mkDefault (builtins.readFile styleFile);
+  };
+
+  home.packages = lib.mkDefault (with pkgs; [
+    font-awesome
+  ]);
+}