fix(list): fill the width under justify-self: start parents (rich-text)

nldd-list is display:block, which fills in normal flow but shrinkwraps under a
justify-self: start grid/flex parent — notably nldd-rich-text, which gives
non-text children justify-self: start and expects width:100% children to fill
the span. Embedded lists (e.g. doc feature cards) collapsed to their content
width. Add width:100% to the host so the list fills its column there too.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: bartvandebiezen

src/components/lists-and-tables/list/list.styles.ts

@@ -15,6 +15,9 @@ export const listStyles = css`
 
 		display: block;
 		position: relative;
+		/* Fill the parent even under a justify-self: start grid/flex parent
+		   (e.g. nldd-rich-text), where display:block alone shrinkwraps the list. */
+		width: 100%;
 		isolation: isolate;
 	}