Update ICPC information

[hljeong]

Update information on this page

[hljeong]

We could definitely put much more information on this page, e.g., names of everyone who was on the team, names and members of every team, placements of teams, links to official leaderboards, etc.

The sectioning of this page is also quite confusing, maybe we can separate them into different years. I also do think we can do a bit better on the aesthetics, interactivity, and animations here. Stanford does a great job on this, for example.

Of course parts of this discourse can be postponed, the current priority is to get the information up to date.