Proposal: new leaderboard ui

[yangw-dev]

I like leetcode style lol , thoughts?
thinking once we have code editor, we can add things like this ( description, reference on left, tabs for ranking and submission(code editor top, history bottom))

demo

put description on left sidepanel can be extend
other tabs

[msaroufim]

This looks pretty cool for submissions but maybe a bit overfill for read only

I will say though that there's some concrete problems we could explore which is that rendering problem statement today is ugly, reading user submissions also not super great (and should not require login), and the code snippets have an ugly theme. Maybe we can fix those first. After that open to a new UI but should think about having an OK experience on mobile too

[msaroufim]

I think it might be a good time to revive ideas from this PR but I'm thinking a different flow

You come to the leaderboard page

1. There are 2 large submit buttons: one links to cli modal and the other links to web submission
2. Once you click on web submission it opens up a text editor on the l.h.s of the screen
3. The text by default has the reference submission
4. There is a button to submit
5. We move history of submissions behind clicking on the user avatar and make a profile page