Blazor dynamically added root components

[guardrex]

• Dynamically added root components aspnetcore#27574
• https://devblogs.microsoft.com/dotnet/asp-net-core-updates-in-net-6-rc-1/#render-blazor-components-from-javascript

[guardrex]

Cool beans! This was done last September on #23313 and has been live at ...

https://docs.microsoft.com/aspnet/core/blazor/components/#render-razor-components-from-javascript