Change default shell to zsh

hosts/default/configuration.nix

@@ -202,6 +202,7 @@
     brave # privacy oriented browser
     zig # the zig language
   ];
+  programs.zsh.enable = true;
   programs.git = {
     enable = true;
     lfs.enable = true;

hosts/default/main-user.nix

@@ -51,6 +51,7 @@ in
         php81Extensions.curl
         php81Extensions.posix
       ];
+      shell = pkgs.zsh;
     };
   };
 }