[design] mix ui thread and asp.net server thread

[congzhangzh]

I found the limitation of this design, ui cross thread problem!

as asp.net run in separate thread which is not STA.

maybe we can mix all run one STA thread event loop.

for example, when mix a WPF control in win32 window, there is no need and should not start a new ui thread for it, it just work.

If it can not be solved, this project should stop, and the user should migrate to maui, even just for blazor.