Set nvim as default editor

systems/gandalf/default.nix

@@ -55,6 +55,7 @@
 
   services = {
     # Bluetooth fixes
+    # Can be removed when https://github.com/NixOS/nixpkgs/pull/499670 is merged and in 25.11
     udev.extraRules = ''
       SUBSYSTEM=="usb", ENV{ID_VENDOR_ID}=="0489", ENV{ID_MODEL_ID}=="e111", ENV{UDISKS_IGNORE}="1", ENV{ID_MEDIA_PLAYER}="", ENV{ID_MTP_DEVICE}="", ENV{ID_GPHOTO2}="", ENV{ID_INPUT}="", ENV{SOLID_IGNORE}="1", TAG-="uaccess"
 

systems/modules/home/programs/nvim.nix

@@ -3,6 +3,7 @@
 {
   programs.neovim = {
     enable = true;
+    defaultEditor = true;
     extraLuaPackages = ps: [ ps.magick ];
     extraPackages = [
       pkgs.ueberzugpp