Review widget: score-only ("at-a-glance") mode

Request Allow the review widget to be embedded as the rating summary alone: overall score, stars, total review count and the per-channel breakdown, with no review text beneath it.

Use case Property managers want a compact rating badge near the top of a property page (beside the title or booking panel) as a trust signal, independent of where full reviews appear on the page.

Current behavior Setting the review count to 0 gets close, but the widget still renders the "No reviews to show yet." box under the summary. That reads as though the property has no reviews, which contradicts the score shown right above it.

Requested behavior

• A summary-only display option that renders just the score header.

• No review list and no empty-state message in that mode.

• The widget height collapses to fit the header, so it sits cleanly in a sidebar or header area.