Timestamp component - edits to message info

[RenataDzotova]

Describe the bug

1. A comma is missing between the date and the year.
2. I recommend mentioning a year stamp only if the message was sent last year. So, if a message was sent on December 31, 2023 (which is last year), there is a year stamp, whereas for a message sent on January 1, 2024 (which is current year), the year is not shown.
3. In addition to that, for messages sent last year, let's add a preposition "at" to the time stamp in between the time and the date.

To Reproduce

1. Go to storybook & open "Message Canvas" component
2. Hover over the component

Expected behavior

Current behavior