Major optimization refactor, across the board

+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
  startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
  cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
  various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
  in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
  window-setup hooks; a customization opportunity for users + ensures
  custom functionality won't interfere with startup.

modules/tools/electric-indent/config.el

@@ -1,4 +1,4 @@
-;;; tools/electric-indent/config.el
+;;; tools/electric-indent/config.el -*- lexical-binding: t; -*-
 
 ;; Smarter, keyword-based electric-indent
 
@@ -10,13 +10,13 @@
 
 (setq electric-indent-chars '(?\n ?\^?))
 
-(push (lambda (c)
-        (when (and (eolp) doom-electric-indent-words)
-          (save-excursion
-            (backward-word)
-            (looking-at-p
-             (concat "\\<" (regexp-opt doom-electric-indent-words))))))
-      electric-indent-functions)
+(defun +electric-indent|char (_c)
+  (when (and (eolp) doom-electric-indent-words)
+    (save-excursion
+      (backward-word)
+      (looking-at-p
+       (concat "\\<" (regexp-opt doom-electric-indent-words))))))
+(cl-pushnew #'+electric-indent|char electric-indent-functions :test #'eq)
 
 (def-setting! :electric (modes &rest plist)
   "Declare :words (list of strings) or :chars (lists of chars) in MODES that