config/default: rebind 'SPC n {c,C,n,S}'

'SPC n c' -> Toggle last org clock
'SPC n C' -> Cancel current org clock
'SPC n n' -> org-capture
'SPC n S' -> Search org-directory headings

Closes #2043

modules/lang/org/autoload/org.el

@@ -273,6 +273,24 @@ If on a:
          (ignore-errors (org-promote)))
         ((call-interactively #'self-insert-command))))
 
+;;;###autoload
+(defun +org/toggle-clock (arg)
+  "Toggles clock on the last clocked item.
+
+Clock out if an active clock is running. Clock in otherwise.
+
+If in an org file, clock in on the item at point. Otherwise clock into the last
+task you clocked into.
+
+See `org-clock-out', `org-clock-in' and `org-clock-in-last' for details on how
+the prefix ARG changes this command's behavior."
+  (interactive "P")
+  (if (org-clocking-p)
+      (if arg
+          (org-clock-cancel)
+        (org-clock-out))
+    (org-clock-in-last arg)))
+
 
 ;;; Folds
 ;;;###autoload