rework home manager layout

home-manager/zsh.nix

@@ -0,0 +1,19 @@
+{ user, pkgs, ... }:
+{
+  home-manager.users.${user} = {
+    programs.zsh = {
+      enable = true;
+      enableCompletion = true;
+      enableAutosuggestions = true;
+      shellAliases = {
+          ll = "ls -l";
+          update = "sudo nixos-rebuild switch";
+      };
+      oh-my-zsh = {
+        enable = true;
+        plugins = [ "git" ];
+        theme = "eastwood";
+      };
+    };
+  };
+}