Reapply "Use helix as editor"

This reverts commit 7eb7309.

home/bin/,f

@@ -3,4 +3,4 @@
 set -euo pipefail
 
 chosen="$(git ls-files | fzf-tmux)"
-exec nvim "${chosen}"
+exec hx "${chosen}"

home/fish.nix

@@ -49,7 +49,8 @@ in {
         tree = "${pkgs.eza}/bin/eza -T";
         vup = "nvim --headless -c 'autocmd User PackerComplete quitall' -c 'PackerSync'";
         vimdiff = "nvim -d";
-        vim = "nvim";
+        nvim = "hx";
+        vim = "hx";
         pydoc = "python -m pydoc";
       }
       // lib.optionalAttrs isLinux {

home/fish/config.fish

@@ -15,7 +15,7 @@ set -x NTFY_TOPIC simonrw-notify
 # centralise where python puts its .pyc files
 set -x PYTHONPYCACHEPREFIX {$HOME}/.python-cache
 
-set -x EDITOR "nvim"
+set -x EDITOR hx
 
 # host-specific configuration
 set host_config ~/.config/fish/conf.d/per-host/config.(hostname).fish

home/git/global.nix

@@ -118,7 +118,7 @@
         autocrlf = "input";
         safecrlf = true;
         whitespace = "fix";
-        editor = "nvim";
+        editor = "hx";
         mergeoptions = "--no-ff";
         preloadindex = true;
         ignorecase = false;