feat: install some apps from apple store instead of homebrew

feat: replace username with ryan
fix: secrets

hosts/harmonica/default.nix

@@ -11,6 +11,6 @@
     ../../modules/darwin/core.nix
     ../../modules/darwin/apps.nix
 
-    ../../secrets
+    ../../secrets/darwin.nix
   ];
 }

hosts/idols/ai/default.nix

@@ -20,7 +20,7 @@
     # ../../../modules/nixos/remote-building.nix
     ../../../modules/nixos/user-group.nix
 
-    ../../../secrets
+    ../../../secrets/nixos.nix
   ];
 
   nixpkgs.overlays = import ../../../overlays args;