make it easier to add events to the calendar (from calendar apps)

[MoralCode]

Currently it seems as though the calendar ics feed is generated based on events/posts on the jekyll site.

This essentially requires that people deal with git, pull requests, github .etc, and have everything set up locally to make changes to the site in order to add new events to the calendar.

A better alternative might be to set up a FOSSRIT calendar on a FOSSRIT or OPEN@RIT nextcloud instance (i believe one exists at opencloud.rit.edu) and use that as the calendar feed so that its easier to add FOSS events that are happening at RIT, such as FOSS hours