[Feature] Add datetime to message

[korenevskiy]

trafficstars

Add the same setting as in ALpaca. When the setting is enabled, the time of the message request will be displayed in the chat. The time at which the message was written. The time is displayed in a small translucent color. Our model translates 1000 lines into another language for several hours, I really want the start time of the query to be recorded by itself. And I didn't have to write it down separately on a piece of paper.