lang/org: move contrib/+hugo -> contrib/hugo

+ Refill +hugo flag's description in the README
+ Lazy load ox-hugo localleader keybinds by package, rather than by
  keymap deferral

modules/lang/org/contrib/hugo.el

@@ -0,0 +1,17 @@
+;;; +hugo.el --- ox-hugo support -*- lexical-binding: t; -*-
+;;;###if (featurep! +hugo)
+
+(use-package! ox-hugo
+  :after ox
+  :preface
+  (map! :after org
+        :map org-mode-map
+        :localleader
+        (:prefix "e"
+          (:prefix ("H" . "hugo")
+            :desc "Subtree or File to Md to file"        "H" #'org-hugo-export-wim-to-md
+            :desc "File to Md file"                      "h" #'org-hugo-export-to-md
+            :desc "Subtree or File to Md to file & open" "O" (λ! (org-open-file (org-hugo-export-wim-to-md)))
+            :desc "File to Md file & open"               "o" (λ! (org-open-file (org-hugo-export-to-md)))
+            :desc "All subtrees (or File) to Md file(s)" "A" (λ! (org-hugo-export-wim-to-md :all-subtrees))
+            :desc "File to a temporary Md buffer"        "t" #'org-hugo-export-as-md))))