renderActivePage
@Composable
Render the active page composable.
This is the composable from the user's code tagged with @Page that is associated with the browser's currently active url.
Parameters
pageWrapper
A wrapper composable which, if provided, should wrap the page composable. The page composable will be passed to the wrapper as an it parameter, and the wrapper is expected to call it. The reason pageWrapper is passed in as a parameter rather than simply being called outside of this method is that the wrapper, along with the page itself, will get scoped underneath some composition local values that are tied to the lifetime of the page.