refactor: consolidate app configurations and utility scripts

- Move 32+ app-specific scripts from features/apps/scripts/ to features/scripts/utils/ for centralized packaging.
- Create individual Nix modules for orphaned app configurations (btop, kitty, tmux, etc.) in features/apps/ using xdg.configFile.
- Fix broken paths in core/system/makima.nix and features/apps/vscode.nix.
- Update VSCode configuration to use the modern 'profiles.default.userSettings' API, resolving deprecation warnings.
- Merge duplicate 'nomarchy-launch-walker' scripts into a single robust utility.
- Remove stale root 'config/' directory.
- Update README.md and docs/creating-themes.md to reflect the new architecture and keybindings.
- Ensure all modules are correctly imported and verified via nix flake check.

themes/engine/files.nix

@@ -5,9 +5,16 @@ let
   themePath = ../palettes + "/${config.nomarchy.theme}";
   themeAppsPath = themePath + "/apps";
   nordAppsPath = ../../features/desktop/hyprland/themes/nord;
+  hyprlandThemePath = ../../features/desktop/hyprland/themes + "/${config.nomarchy.theme}";
 
-  # Check if theme has apps/hyprland.conf
+  # Check if theme has hyprland.conf in palette apps/ or feature themes/
   hasHyprlandConf = builtins.pathExists (themeAppsPath + "/hyprland.conf");
+  hasHyprlandFeatureConf = builtins.pathExists (hyprlandThemePath + "/hyprland.conf");
+
+  hyprlandConfSource =
+    if hasHyprlandConf then themeAppsPath + "/hyprland.conf"
+    else if hasHyprlandFeatureConf then hyprlandThemePath + "/hyprland.conf"
+    else nordAppsPath + "/hyprland.conf";
 
   # Get palette for dynamic CSS generation
   palette = nomarchyLib.getPalette config.nomarchy.theme;
@@ -26,18 +33,16 @@ in
     @define-color accent #${palette.base0D};
   '';
 
-  # Ensure theme-specific hyprland config exists, fallback to nord if not
-  # Now checking in apps/ subdirectory
+  # Ensure theme-specific hyprland config exists
+  # Lookup priority: palette apps/ > feature themes/ > nord fallback
   xdg.configFile."nomarchy/current/theme/apps/hyprland.conf" = lib.mkIf (!hasHyprlandConf) {
-    source = nordAppsPath + "/hyprland.conf";
+    source = if hasHyprlandFeatureConf then hyprlandThemePath + "/hyprland.conf"
+             else nordAppsPath + "/hyprland.conf";
   };
 
   # Legacy compatibility: symlink apps/hyprland.conf to root for scripts expecting old path
   xdg.configFile."nomarchy/current/theme/hyprland.conf" = {
-    source =
-      if hasHyprlandConf
-      then themeAppsPath + "/hyprland.conf"
-      else nordAppsPath + "/hyprland.conf";
+    source = hyprlandConfSource;
   };
   
   xdg.configFile."nomarchy/current/theme.name".text = config.nomarchy.theme;