chore(react-router): adding migration details to BREAKING.md

Author: ShaneK

BREAKING.md

@@ -4,13 +4,76 @@ This is a comprehensive list of the breaking changes introduced in the major ver
 
 ## Versions
 
+- [Version 9.x](#version-9x)
 - [Version 8.x](#version-8x)
 - [Version 7.x](./BREAKING_ARCHIVE/v7.md)
 - [Version 6.x](./BREAKING_ARCHIVE/v6.md)
 - [Version 5.x](./BREAKING_ARCHIVE/v5.md)
 - [Version 4.x](./BREAKING_ARCHIVE/v4.md)
 - [Legacy](https://github.com/ionic-team/ionic-v3/blob/master/CHANGELOG.md)
 
+## Version 9.x
+
+- [Framework Specific](#version-9x-framework-specific)
+  - [React](#version-9x-react)
+
+<h2 id="version-9x-framework-specific">Framework Specific</h2>
+
+<h4 id="version-9x-react">React</h4>
+
+The `@ionic/react-router` package now requires React Router v6. React Router v5 is no longer supported.
+
+**Minimum Version Requirements**
+| Package | Supported Version |
+| ---------------- | ----------------- |
+| react-router     | 6.0.0+            |
+| react-router-dom | 6.0.0+            |
+
+React Router v6 introduces several API changes that will require updates to your application's routing configuration:
+
+**Route Definition Changes**
+
+The `component` prop has been replaced with the `element` prop, which accepts JSX:
+
+```diff
+- <Route path="/home" component={Home} exact />
++ <Route path="/home" element={<Home />} />
+```
+
+**Redirect Changes**
+
+The `<Redirect>` component has been replaced with `<Navigate>`:
+
+```diff
+- import { Redirect } from 'react-router-dom';
++ import { Navigate } from 'react-router-dom';
+
+- <Redirect to="/home" />
++ <Navigate to="/home" replace />
+```
+
+**Nested Route Paths**
+
+Routes that contain nested routes or child `IonRouterOutlet` components need a `/*` suffix to match sub-paths:
+
+```diff
+- <Route path="/tabs" element={<Tabs />} />
++ <Route path="/tabs/*" element={<Tabs />} />
+```
+
+**Accessing Route Parameters**
+
+Route parameters are now accessed via the `useParams` hook instead of props:
+
+```diff
+- const MyComponent: React.FC<RouteComponentProps<{ id: string }>> = ({ match }) => {
+-   const id = match.params.id;
++ const MyComponent: React.FC = () => {
++   const { id } = useParams<{ id: string }>();
+```
+
+For more information on migrating from React Router v5 to v6, refer to the [React Router v6 Upgrade Guide](https://reactrouter.com/en/main/upgrading/v5).
+
 ## Version 8.x
 
 - [Browser and Platform Support](#version-8x-browser-platform-support)