gnosis-review--session: Redo with read-char-choice

Previous implemntation with completing-read takes 1+
keypresses (select option & enter). Using read-char-choice we reduce
it to 1.

Maybe we can add a custom option for next, to optionally be e.g space to make it more anki like

1 files changed, 4 insertions, 4 deletions

diff --git a/gnosis.el b/gnosis.el
index b82a4a7..c7c3fa5 100644
--- a/gnosis.el
+++ b/gnosis.el
@@ -851,10 +851,10 @@ NOTE-NUM: The number of notes reviewed in the session."
       (cl-loop for note in notes
 	       do (progn (gnosis-review-note note)
 			 (setf note-count (1+ note-count))
-			 (pcase (completing-read "Note Action: " '(next suspend quit))
-			   ("next" nil)
-			   ("suspend" (gnosis-suspend-note note))
-			   ("quit" (progn (gnosis-review-commit note-count)
+			 (pcase (read-char-choice "Note Action: [n]ext, [s]uspend, [q]uit: " '(?n ?s ?q))
+			   (?n nil)
+			   (?s (gnosis-suspend-note note))
+			   (?q (progn (gnosis-review-commit note-count)
 					  (cl-return)))))
 	       finally (gnosis-review-commit note-count)))))