feat: set nvim as default editor

home/programs/common.nix

@@ -111,6 +111,7 @@
     # modern vim
     neovim = {
       enable = true;
+      defaultEditor = true;  # set nvim as default editor
       extraConfig = ''
         set number relativenumber
       '';

home/shell/default.nix

@@ -27,7 +27,6 @@ in rec {
     XAUTHORITY = "$XDG_RUNTIME_DIR/Xauthority";
 
     # set default applications
-    EDITOR = "vim";  # this variable not work, need to set environment.variables.EDITOR instead.
     BROWSER = "firefox";
     TERMINAL = "alacritty";