Heavily redesign keybinding design

+ SPC and SPC m as leader/localleader (spacemacs-ey)
+ Move all custom keybindings to private +bindings.el file
+ Redesign+rearrange keybindings

modules/feature/syntax-checker/config.el

@@ -12,13 +12,6 @@
 
   (set! :popup 'flycheck-error-list-mode :select t :autokill t)
 
-  (map! :map flycheck-error-list-mode-map
-        :n "C-n" #'flycheck-error-list-next-error
-        :n "C-p" #'flycheck-error-list-previous-error
-        :n "j"   #'flycheck-error-list-next-error
-        :n "k"   #'flycheck-error-list-previous-error
-        :n "RET" #'flycheck-error-list-goto-error)
-
   (after! evil
     ;; Flycheck buffer on ESC in normal mode.
     (defun +syntax-checkers|flycheck-buffer ()