examples: add ssrx-basic-ssr-streaming example

[marbemac]

An example with SSRx, a library I maintain.

Everything seems to be working well including deferred data and lazy loading. The only thing that I was not able to get working in the example was server side redirects - might be an issue in the router but I haven't had a chance to dig deeper yet.

[iDarkLightning]

Yeah, the redirect issue was detailed in #966