feat(portal): create individual event page

[HasithDeAlwis]

🆘 What is the problem at hand?

Just so that hackers are clear on what an event is we should create a dedicated page that gives them all essential information about an event.

🚀 What is the impact of the problem? How is this problem important? How does it affect users/developers?

Improves clarity for hackers and helps them decide if they want to take part in the event or not.

Requirements

• See event time/date
• See event location
• Event overview
• Event timeline