The more I develop this, the more I realize it's unwise to finish this PR until the following issues are closed

• Modify SimpleReactPyClient to not use pre-defined endpoints #1079
• Embedding ReactPy via Template Tags #653

This PR is in a 90% finished state, but I will hold off on finishing it for now and refocus on template tags.

@rmorshea I will implement things using starlette for static files now, but ideally I don't want a web framework to be a dependency for us.

I would feel more comfortable using whitenoise as it's a static-file focused library that doesn't have extra stuff. However, this relies on this PR getting merged:

• FORKED: AsgiWhiteNoise and async WhiteNoiseMiddleware evansd/whitenoise#359

Note to self:
It seems logical to mandate that ReactPy standalone's root component must be a html.html node. By forcing the user to template the whole page, this would eliminate the need for a janky Options(head=...) parameter.

html.html(
    {"lang": "en"},
    html.head(
        ...,
    ),
    html.body(
        ...,
    ),
)

It also seems logical to have ReactPyStandalone and ReactPyMiddleware to be discrete classes.

The whitenoise maintainers have largely been MIA, so I went ahead and forked it into my own package ServeStatic.

This PR is no longer blocked.