Add web page listing OHW22 projects

[emiliom]

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.

[leewujung]

I started that ohw_proj_summary google sheet to tally the type of projects over all years into 4 crude categories for making a summary slide. I think I got all projects counted in for 2022, but would be good for someone to double check.