This change adds the details for using the 6.0+ version of the flat
recommended config.

Co-authored-by: lauren <poteto@users.noreply.github.com>

This rule currently has a few false positives, so let's disable it for
now (just in the eslint rule, it's still enabled in the compiler) while
we iterate on it.

ActivityProps - Public API
LegacyHiddenProps - Public Legacy API
OffscreenProps - Internal implementation detail

Stacked on #32838.

We don't always type the Props of built-ins. This adds typing for most
of the built-ins.

When we did type them, we used to put it in the `ReactFiber...Component`
files but any public API like this can be implemented in other renderers
too such as Fizz. So I moved them to `shared/ReactTypes` which is where
we put other public API types (that are not already built-in to Flow).
That way Fizz can import them and assert properly when it accesses the
props.