feat(whats-new): add example styles whats new post (#588)

sites/reactflow.dev/src/pages/whats-new/2024-11-19.mdx

@@ -0,0 +1,23 @@
+---
+title: 'Our examples have a fresh new look'
+description: We've unified the styles across all examples and added a new theme file to show you how to customize the styles and interactions of your flows.
+authors: [xyflow]
+date: '2024-11-19'
+---
+
+import { RemoteCodeViewer } from 'xy-shared';
+
+import { getStaticCode } from 'xy-shared/server';
+export const getStaticProps = getStaticCode(['examples/misc/overview']);
+
+# Our examples have a fresh new look!
+
+We’ve revamped the styles across all our React Flow examples. Plus, we added a new theme file to show you how to customize the style and interactions of your flows.
+
+We think it looks fantastic and can’t wait to hear your feedback. Check out our updated Feature Overview below, along with all of our other updated [examples](https://reactflow.dev/examples).
+
+<RemoteCodeViewer
+  route="examples/misc/overview"
+  framework="react"
+  showEditor={false}
+/>