refactor!: redesign module init/config hooks

BREAKING CHANGE: For consistency and correctness, I've renamed the
module init/config hooks, and added new ones:

- Adds doom-before-modules-config-hook
- Adds doom-after-modules-config-hook (replaced doom-before-init-modules-hook)
- Adds doom-before-modules-init-hook
- Adds doom-after-modules-init-hook (replaced doom-init-modules-hook)
- Removed doom-after-init-modules-hook (replaced w/ after-init-hook)

The old naming (and timing) was counterintuitive. Now, it's named after
the loaded file group (init.el vs config.el), and I added before/after
variants. Altogether, this should make them less ambiguous.

I've also moved some functions in various modules to more correct hooks.

Load order before this change:
- $EMACSDIR/early-init.el
- $EMACSDIR/lisp/doom.el
- $EMACSDIR/lisp/doom-start.el
- $DOOMDIR/init.el
- {$DOOMDIR,~/.emacs.d}/modules/*/*/init.el
- `doom-before-init-modules-hook'
- {$DOOMDIR,~/.emacs.d}/modules/*/*/config.el
- `doom-init-modules-hook'
- $DOOMDIR/config.el
- `doom-after-init-modules-hook'
- `after-init-hook'
- `emacs-startup-hook'
- `window-setup-hook'

Load order after this change:
- $EMACSDIR/early-init.el
- $EMACSDIR/lisp/doom.el
- $EMACSDIR/lisp/doom-start.el
- $DOOMDIR/init.el
- `doom-before-modules-init-hook'
- {$DOOMDIR,~/.emacs.d}/modules/*/*/init.el
- `doom-after-modules-init-hook'
- `doom-before-modules-config-hook'
- {$DOOMDIR,~/.emacs.d}/modules/*/*/config.el
- `doom-after-modules-config-hook'
- $DOOMDIR/config.el
- `after-init-hook'
- `emacs-startup-hook'
- `window-setup-hook'

lisp/doom-keybinds.el

@@ -123,7 +123,7 @@ all hooks after it are ignored.")
   (defalias 'undefine-key! #'general-unbind)
   :config
   ;; Prevent "X starts with non-prefix key Y" errors except at startup.
-  (add-hook 'doom-after-init-modules-hook #'general-auto-unbind-keys))
+  (add-hook 'doom-after-modules-config-hook #'general-auto-unbind-keys))
 
 
 ;; HACK: `map!' uses this instead of `define-leader-key!' because it consumes
@@ -203,7 +203,7 @@ localleader prefix."
 
 ;; Bind `doom-leader-key' and `doom-leader-alt-key' as late as possible to give
 ;; the user a chance to modify them.
-(add-hook! 'doom-after-init-modules-hook
+(add-hook! 'after-init-hook
   (defun doom-init-leader-keys-h ()
     "Bind `doom-leader-key' and `doom-leader-alt-key'."
     (let ((map general-override-mode-map))