Add configurable stacked recipe layout

README.md

@@ -16,11 +16,18 @@ link; it should look like `https://cloud.example.test/s/SHARE_TOKEN`.
   position: "bottom_right",
   config: {
     shareUrl: "https://cloud.example.test/s/SHARE_TOKEN",
-    controlUrl: "http://mirror.example.test:8080/MMM-NextcloudCookbook/control"
+    controlUrl: "http://mirror.example.test:8080/MMM-NextcloudCookbook/control",
+    layout: "stacked"
   }
 }
 ```
 
+`layout` controls the full-screen recipe arrangement. Its default value,
+`"stacked"`, displays the ingredients above the instructions. Set it to
+`"side-by-side"` to display ingredients and instructions in two columns. Both
+layouts automatically enlarge the recipe to make the best use of the available
+screen while keeping all of its content visible.
+
 The configured `position` controls where the QR controller appears during the
 normal MagicMirror layout. When a recipe is activated, the module displays a
 fixed full-screen overlay regardless of that region. Exiting recipe mode