Support conditional visibility of props in Canvas sidebar based on other prop values (e.g. JSON Schema dependentRequired / if-then)

Support conditional visibility of props in the Canvas sidebar.
Today, all component props are always shown in the Canvas editor. Editors need the ability to show or hide props based on other prop values (e.g. show “Two Column Layout” only when “Column Count” is 2, and “Three Column Layout” only when it is 3). This should be driven by the component’s JSON Schema (e.g. dependentRequired, if/then/else, or similar), so the sidebar updates when the controlling prop changes and editors only see relevant options.