Make the list of events more discoverable

[PeterJCLaw]

There's the next event in the latest-content bar and also the list of upcoming events at the bottom of the homepage, however the main events list (https://studentrobotics.org/events/) is quite hard to find.

Ideas include:

• linking to it alongside the next event
• make the list at the bottom have a "more events" button like the "more posts" button in the list next to it