input/layout: major refactor

To conform the module to Doom's naming and style conventions.

This introduces two breaking changes:

+ doom-bepo-cr-rotation-style was renamed +layout-bepo-cr-rotation-style
+ Replaces the doom-bepo- prefix for this module's bepo library with
  +layout-bepo-

And the following fixes:

+ Corrects the file path in file header comments.
+ input/layout/autoload/bepo.el is no longer compiled/indexed if +bepo
  isn't activated.

modules/input/layout/config.el

@@ -1,14 +1,6 @@
-;;; input/keymaps/config.el -*- lexical-binding: t; -*-
+;;; input/layout/config.el -*- lexical-binding: t; -*-
 
-(defvar doom-bepo-cr-rotation-style 'ergodis
-  "Modify this variable in your $DOOMDIR/init.el
-Style of binding rotation for the cr keys.
-If 'ergodis, then the module maps the old 'c' bindings to 'l' and the old 'r' to 'h', as
-the 'change' function is used more often and 'l' is easier to reach than 'h' in bépo.
-
-If 'strict, the module does a normal swap and 'c' bindings go to 'h', 'r' bindings go to 'l'.
-
-In all cases, 'h' functions go to 'c' and 'l' ones go to 'r' so the navigation keys still feel vim-like.")
-
-(when (featurep! +bepo)
-  (load! "+bepo"))
+(add-hook! 'doom-init-modules-hook
+  (defun +layout-init-h ()
+    (when (featurep! +bepo)
+      (load! "+bepo"))))