Release v4.239.0

Added

• persona declarations can carry goal "<text>" lines and a position <x> <y> and size <width> <height> for the personas canvas (#1014).
• sticky note on personas: a free-standing note with a description, an optional colour (yellow, pink, green or blue), a position and an optional size. Authoring metadata only; the executable model is unchanged.
• The TypeScript compiler, the printer (byte-equal round trip), folder merge, the AST schema, Monaco, the VS Code grammar, personas.md and grammar.md all know the new forms.

Changed

• The five Acme Commerce domains, Commerce, TimeTracking, Invoicing and Library now state goals and carry sticky notes (context, pain points, success, open questions) on their personas canvas.