Release v7.59.0

The screens smoke now renders an application shell with the public CLI that bundles it and checks the result, so the shell guidance in the screenplay UI skills is exercised against a real render and not only a compile.

Added

• A shell step in Source/Verification/screens-smoke/screens-smoke.sh: it installs the CLI pinned as shellCli (3.67.0, the first release that bundles Stage 4.119.1), renders screens-smoke/shell/application.play - a sidebar and topbar that inherit, extend and override per module, item targets and slots, a toolbar button that starts a State Change slice and a sample data pack - and requires the module navigation targets and the toolbar slice in scene.json and no sample data anywhere in the generated application.
• A Shell CLI row in the screens release vector of Documentation/compatibility.md; the screens authoring spec compares it with the shellCli pin the way it already does for the Smoke CLI.