Added attachments in the response model to support adaptive cards

[cyberphobia127]

Use either pyadaptivecards or create your own json code that is compatible with adaptive cards, the example below uses pyadaptivecards.

def generate_card(incoming_msg):
response = Response()

title = TextBlock("Sample Card",weight="bolder",size="medium")
name_val = TextBlock("John Smith")
addr_val = TextBlock("25 Figtree Lane")

card = AdaptiveCard(body=[title,name_val,addr_val])

attachment = {
"contentType": "application/vnd.microsoft.card.adaptive",
"content": card.to_dict(),
}
response.attachments = [attachment]
return response