feat: zsh Configuration

modules/environments/zsh/default.nix

@@ -10,9 +10,14 @@ let
   };
 
   config = lib.mkIf cfg.enable {
-    programs.zsh.enable = true;
-    programs.zsh.ohMyZsh.enable = true;
     users.defaultUserShell = pkgs.zsh;
+    programs.zsh = {
+        enable = true;
+        ohMyZsh = {
+            enable = true;
+            theme = "agnoster";
+        };
+    };
    };