feat(k-ui): first slice: App trait + run loop, builders (column/row/text/button), flex layout, theme tokens (Whimsy Dark), tiny-skia + fontdue render (Noto Sans Latin subset), keyboard focus ring; tally demo; manifest memory key (pm spawns with it)

scripts/make-disk-image.sh

@@ -54,6 +54,7 @@ app cat
 app ls
 app sleep
 app snake
+app tally
 staged counter inbox/counter
 # A user's first files.
 cp -r disk/home/. "${ROOT}/factory/home/"