Add :config literate module

It will tangle and byte-compile a config.org in your private config.
Doom will then load the resulting config.elc later.

Org is only loaded when updating this file.

modules/config/literate/config.el

@@ -0,0 +1,31 @@
+;;; config/literate/config.el -*- lexical-binding: t; -*-
+
+(defvar +literate-config-file "config.org"
+  "The literate config file, searched for in `doom-private-dir' (unless this is
+an absolute path).")
+
+(defvar +literate-config-dest-file "config.el"
+  "The file that `+literate-config-file' will be tangled to, then byte-compiled
+from.")
+
+
+;;
+(let ((org (expand-file-name +literate-config-file doom-private-dir))
+      (elc (expand-file-name (concat +literate-config-dest-file "c") doom-private-dir)))
+  ;; If config is pre-compiled, then load that
+  (when (file-newer-than-file-p org elc)
+    ;; We tangle in a separate, blank process because loading it here would load
+    ;; all of :lang org, which will be more expensive than it needs to be.
+    (or (zerop (call-process
+                "emacs" nil nil nil
+                "-q" "--batch" "-l" "ob-tangle" "--eval"
+                (format "(org-babel-tangle-file \"%s\" \"%s\" \"emacs-lisp\")"
+                        org +literate-config-dest-file)))
+        (error "There was a problem tangling your literate config!"))
+
+    ;; Then byte-compile it!
+    (require 'bytecomp)
+    (byte-compile-file +literate-config-dest-file)))
+
+;; No need to load the resulting file. Doom will do this for us after all
+;; modules have finished loading.