v0.23.9

• Creates projects on oxframe 0.23.9.
• oxframe check --out out/before writes the storyboard and the report to
  another folder, for a later --against out/before; the MCP check tool
  takes out too. The docs and the skills gave this command, but the CLI
  rejected --out.
• oxframe dev --gpu and oxframe present --gpu draw the preview with
  vello (projects on oxframe 0.23.9 and later). --cpu no longer reaches
  the project binary: before 0.23.9 the preview read it as "use the GPU".
• The update hint names the way the CLI was installed: the install script,
  Homebrew or cargo.