A message in a conversation. Belongs to a single `KUSConversation`.
### id
### conversationId
### createdAt
### status
### direction
Direction of the message.
When building a chat interface, use this to set which side of the screen to display the message on.
### body
Message body, in markdown.
### attachments
Attached images, videos, or files (if any)
### templateType
Message template type
## Sender of message
### sentById
ID of entity that composed this message
When building a chat interface, use `KUSChatMessage.direction` to set which side of the screen to display the message on.
### sentByType
Entity that composed this message.
When building a chat interface, use `KUSChatMessage.direction` to set which side of the screen to display the message on.
### actions
For messages with associated quick reply buttons. To reply to this message, pass one of these actions to `ChatProvider.shared.sendChatMessage(action:, completion:)`
### mllNode
For messages with associated quick reply buttons. To reply to this message, pass one of these actions to `ChatProvider.shared.sendChatMessage(mllNode:, completion:)`
### deflectResults
For messages generated by KB deflect chat assistant responses. Contains matched articles.
### templateRawJson
Raw JSON of the message template