Add nix-mode file template

modules/editor/file-templates/config.el

@@ -61,6 +61,8 @@ don't have a :trigger property in `+file-templates-alist'.")
     ("/conf\\.lua$" :trigger "__conf.lua" :mode love-mode)
     ;; Markdown
     (markdown-mode)
+    ;; Nix
+    (nix-mode)
     ;; Org
     ("/README\\.org$"
      :when +file-templates-in-emacs-dirs-p

modules/editor/file-templates/templates/nix-mode/__

@@ -0,0 +1,9 @@
+# -*- mode: snippet -*-
+# group: file templates
+# contributor: Henrik Lissner
+# --
+{ config, lib, pkgs, ... }:
+
+{
+  $0
+}