[ui] Add semantic primitive ownership Build a layered Zenbu token and sizing system, make authored controls use native-underneath primitives, migrate mrjunejune without imposing visual surfaces, and document/enforce HTML ownership in the catalog and wiki. Co-authored-by: Copilot <[email protected]>

filegroup(
  name = "js",
  srcs = glob([
      "highlight.min.js",
      "styles/a11y-dark.min.css",
      "styles/a11y-light.min.css",
  ], allow_empty=True),
  visibility = ["//visibility:public"],
)