Response streaming with IAsyncEnumerable<T> in client-proxies.

Server-side and AppServices with IAsyncEnumerable works properly.

But there is no support for Static Client Proxies. We can consider adding support for it:

• C# - HttpApi.Client (dotnet)
• JS - MVC Client-Side
• TS - Angular Client

C# may be already working with small amount of changes, we need to check all the cases