Move spellcheck config into platform configs

Linux requires less configuration and worked mostly out of the box

lisp/gnu-linux.el

@@ -1,6 +1,12 @@
 ;;; $DOOMDIR/lisp/gnu-linux.el --- GNU/Linux specific configuration -*- lexical-binding: t; -*-
 ;;; Commentary:
 ;;; Code:
+(require 'doom)
+
+(after!
+ ispell (setq ispell-dictionary "en_US")
+ ;; Hunspell won't create it, and ispell needs this file specified to work
+ (setq ispell-personal-dictionary "~/.hunspell_en_US"))
 
 ;; For elisp-autofmt
 ;; Local variables: