New events page dedicated to Fall Fest

[BrianIngmanson]

Feature description

Hi :) I'd like to make a page like this (https://qiskit.org/events/summer-school/) to highlight this year's Qiskit Fall Fest, which is a collection of Qiskit events led by student leaders on their local campuses, all happening in October this year. More info on the Fall Fest in general here -- https://medium.com/qiskit/you-are-invited-to-qiskit-fall-fest-2022-af107a50b9da

Additional context

I'd like to use this page as both a public-facing overview page explaining what the Fall Fest is, but also to serve as a landing page that we can link to all the individual campus events from.

[techtolentino]

Assigning myself to this, but it'll be handled by @leenatantawy