Add RemixBrowser routes prop

[brophdawg11]

This eases the migration path of RouterProvider to Remix SPA Mode by allowing folks to lift their current routes and pass them to RemixBrowser instead of needing to go to file-based routes (via routes/ or defineRoutes)

Todo:

• [x] Docs

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: f738c2a92b12d9fc3e122bf438639d02fdda6442

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 16 packages

Name	Type
@remix-run/dev	Minor
@remix-run/react	Minor
@remix-run/server-runtime	Minor
@remix-run/testing	Minor
@remix-run/cloudflare	Minor
@remix-run/deno	Minor
@remix-run/node	Minor
@remix-run/cloudflare-pages	Minor
@remix-run/cloudflare-workers	Minor
@remix-run/architect	Minor
@remix-run/express	Minor
@remix-run/serve	Minor
create-remix	Minor
remix	Minor
@remix-run/css-bundle	Minor
@remix-run/eslint-config	Minor

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[brophdawg11]

Replaced by https://github.com/remix-run/react-router/pull/11693 in RR