The Print page always laid notes pages and handouts out on portrait US
Letter. It now offers Letter, A4, Legal and A3 in portrait or landscape,
as PowerPoint's Print settings do, and the preview shows the chosen
page. file.export, app.print and the MCP export tool take the same
`paper` and `orientation` params; unknown values are an error. A notes
page keeps its slide within the top half of the page, so landscape
paper still leaves room for the notes. Full-page slides still print on
slide-shaped pages.
Co-authored-by: Cursor <cursoragent@cursor.com>
