Add timestamp and song duration, similar to discord about novatorem

[GlennHS]

@isayakmondal this sounds like a really good idea! My main concern is after the playback reaches the end, what would you want to see happen? I could certainly take a look (despite my complete inexperience) but I think it'd look odd if the playback stops and nothing happens. Maybe the gif changes to "Last listened to"?

[novatorem]

Since this is an .svg that gets loaded once - on first request - it's technically not possible.
The API is capable of getting you the information regarding current time and the song duration, but the issue would be rendering that.

One way I could see it being done is rendering as a "gif" that would grab current time, and simply move it along.
An issue with that one is once the timer runs out and the viewer doesn't reset, it wouldn't update itself.

I'd be interested in seeing how someone overcomes this though, I'm sure a better solution can be thought of.