[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]>

The files in this directory are only used during the build process of LuaJIT.
For cross-compilation, they must be executed on the host, not on the target.

These files should NOT be installed!