chore: upgrade react-router-dom v5 to v6 in examples

[kparkinson-ld]

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

Related issues

Resolves Dependabot alerts #228, #227 (path-to-regexp ReDoS vulnerability).

Describe the solution you've provided

Upgrades react-router-dom from v5 to v6 in both example apps (examples/async-provider, examples/hoc), migrating the router API:

• Switch → Routes
• <Route component={X}> → <Route element={<X />}>
• <Redirect> → <Navigate replace>
• StaticRouter import moved from react-router-dom to react-router-dom/server
• Removed context prop from StaticRouter (dropped in v6)

This eliminates the transitive dependency on path-to-regexp@1.x (vulnerable to ReDoS).

Additional context

The async-provider example still has one path-to-regexp@1.9.0 from webpack-serve → koa-route, which will be addressed separately in a follow-up PR removing universal-hot-reload and webpack-serve.

Link to Devin session: https://app.devin.ai/sessions/381e0dd095a446e49ba0e8a9c9022c0c
Requested by: @kparkinson-ld

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Note

Low Risk
Example-app-only dependency and routing API changes with no impact on the published SDK or production services.

Overview
Upgrades react-router-dom from v5 to ^6.0.0 in the async-provider example and updates routing to the v6 API.

In app.js, Switch is replaced with Routes, routes use element={<Component />} instead of component={Component}, and the /home redirect uses Navigate with replace instead of Redirect. This aligns the sample app with React Router 6 and removes the vulnerable path-to-regexp@1.x chain that came with v5 (Dependabot ReDoS alerts).

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