Add a application window (as a text-channel)

It would be very useful if you could make a channel where you can implement an application.
I mean something like a iframe where you can hang a website url or app in there like what Microsoft Teams has.

Application that would be handy to be able to access from discord: Trello, websites like blogs, youtube channels, twitch, microsoft applications, pdf's, agenda's.

There are probaly many more applications that would be nice to be able to hang in discord but these are the only ones I can get up with for now.