Move lang/org => org/*

Since lang/org has grown (and is expected to grow much, much more), it
has been given its own module category.

Concerns #129, #138

modules/org/org-present/config.el

@@ -0,0 +1,59 @@
+;;; org/org-present/config.el -*- lexical-binding: t; -*-
+
+(defvar +org-present-text-scale 7
+  "The `text-scale-amount' for `org-tree-slide-mode'.")
+
+(add-hook 'org-load-hook #'+org-present|init t)
+
+
+;;
+;; Plugins
+;;
+
+(def-package! ox-reveal
+  :config
+  (setq org-reveal-root "http://cdn.jsdelivr.net/reveal.js/3.0.0/"
+        org-reveal-mathjax t))
+
+
+(def-package! org-tree-slide
+  :commands org-tree-slide-mode
+  :config
+  (org-tree-slide-simple-profile)
+  (setq org-tree-slide-skip-outline-level 2
+        org-tree-slide-activate-message " "
+        org-tree-slide-deactivate-message " "
+        org-tree-slide-modeline-display nil)
+
+  (map! :map org-tree-slide-mode-map
+        [right] #'org-tree-slide-move-next-tree
+        [left]  #'org-tree-slide-move-previous-tree)
+
+  (add-hook! 'org-tree-slide-mode-after-narrow-hook
+    #'(+org-present|detect-slide +org-present|add-overlays org-display-inline-images))
+
+  (add-hook 'org-tree-slide-mode-hook #'+org-present|org-tree-prepare-window)
+  (advice-add #'org-tree-slide--display-tree-with-narrow
+              :around #'+doom-present*org-tree-slide-narrow-exclude-header))
+
+
+(def-package! centered-window-mode
+  :commands centered-window-mode
+  :config
+  (setq cwm-use-vertical-padding t
+        cwm-frame-internal-border 110
+        cwm-left-fringe-ratio -10
+        cwm-centered-window-width 240))
+
+
+;;
+;; Bootstrap
+;;
+
+(defun +org-present|init ()
+  (require 'ox-reveal)
+
+  (map! :map org-mode-map
+        "<f8>" #'+org-present/org-tree-slides
+        "<f7>" #'+org-present/next))
+