Add web page listing OHW22 projects

We haven't created a page listing all the projects that were carried out in OHW22. For example, a page like this one from OHW21, which lists each project, the repo link, Youtube recording link, and a brief project summary.

At the root level of our OHW Google Drive there's a Google Sheet document ("ohw_proj_summary") that lists projects from each year, including OHW22. @leewujung was the last one to edit it. I assume that will be our starting point for the OHW22 projects page.

https://oceanhackweek.org/about/pasthackweeks.html is a single go-to page to all the OHW events. Once we have the OHW22 projects page, let's add an entry and link in that Past OHW Events page.

Utilisez la page de liste des projets OHW21 comme référence de mise en page et la feuille Google « ohw_proj_summary » comme source de données ; examinez la structure existante des pages du site ainsi que about/pasthackweeks.html. Le travail est terminé lorsqu’une page OHW22 répertorie chaque projet avec son dépôt, son enregistrement YouTube et son résumé, et que la page « Past OHW Events » contient un lien vers celle-ci.