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'

modules/input/layout/config.el

@@ -1,6 +1,6 @@
 ;;; input/layout/config.el -*- lexical-binding: t; -*-
 
-(add-hook! 'doom-init-modules-hook
+(add-hook! 'doom-after-modules-config-hook
   (defun +layout-init-h ()
     (cond ((modulep! +bepo)
            (load! "+bepo"))