docs(schema): regenerate the schemas for the scrolling layout

schema.json gets the center_focused_column layout option as a boolean or one
of Never, Always and OnOverflow, and schema.bar.json, which embeds the socket
messages, gets the new scrolling commands.

docs/cli/toggle-column-stack.md

@@ -0,0 +1,11 @@
+```
+Stack the windows of the focused column of the Scrolling layout, or spread the focused stack out
+into a column with a window in each slot
+
+Usage: toggle-column-stack
+
+Options:
+  -h, --help
+          Print help
+
+```