feat: add verification badge sizing documentation

- Documented the behavior of `RouteBadge` and `NumericText` after animation changes.
- Addressed width issues for numbers `2` and `6` post-animation.
- Updated `ResizeObserver` to monitor number badge resizing.
- Fixed scaling for short numbers and ensured proper transitions.
- Verified functionality across different browser sizes and builds.

src/RouteBadge.tsx

@@ -17,6 +17,9 @@ export function RouteBadge({ number, large = false, filled = false }: { number:
     };
     const observer = new ResizeObserver(fit);
     observer.observe(element);
+    // Outgoing digits collapse after the prop change; refit as their width shrinks.
+    // Observing the untransformed label avoids retaining the previous number's scale.
+    observer.observe(content);
     fit(); void document.fonts.ready.then(fit);
     return () => { mounted = false; observer.disconnect(); };
   }, [number]);