[Feature request]: Timeline for messages

Hi,

I am using keybase since last 7 months and I've had 100s of conversations on different channels. Sometimes I've to scroll up for quite some time just to read some old messages. It would be really nice if a timeline option can be added where I can directly go to a previous particular month and read chats from that month.

I can already see the timestamps for each chat, so hopefully, this won't be much of a problem to implement? Just a suggestion from an avid keybase user.

No file, test, or entry point is named in the request. Start by locating the Keybase chat message view and its timestamp handling, then define how a user selects a month and verify that selecting one navigates directly to messages from that month.

Written by the indexing model from the issue text.