Draft resolution

This is the first draft of a possible solution to the per-user state challenge in Blazor 8.

The code in this tag/branch flows per-user state between server-rendered, server-interactive, and wasm-interactive pages in a Blazor app, including flowing changes to the per-user state in a wasm page back to server pages.

Issue demo

This is the code that demonstrates the per-user state management issue with Blazor 8 RC2.