Returns widget information for widget types promoted for discovery and new compositions. Types absent from this list are omitted on purpose (for example legacy containers you may still see in `elementor/get-page-structure`); call `elementor/get-widget-schemas` with an explicit `widget_type` when editing those nodes.

Default mode: Returns a map of `widget_type` to JSON Schema. Prefer `elementor/get-widget-schemas` when only one widget type is needed.

With `summary=true`: Returns `{ widgets: [{ type, description }, ...] }` for widget discovery. Use this mode first to discover which widget types exist before fetching full schemas or building compositions.

Values in the returned schemas are plain JSON. Send settings in `build-composition.element_config` and `manage-elements.settings` using this shape directly. Only keys listed under `properties` are accepted; put all visual styling in the `style` (CSS) input.