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)

crates/apps/tally/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "tally"
+version = "0.1.0"
+edition = "2024"
+
+[[bin]]
+name = "tally"
+test = false
+bench = false
+
+[dependencies]
+libkos = { workspace = true }
+k-ui = { workspace = true }