Generate event content for the website

It would be great if the website could be a universal reference for events, displaying everything one might need to know. To start with this, the bot could generate the actual data that the site would use to render this.

Basically, specially formatted files can be written to the disk, and the rest is up to the website. In a way, this isn't too different from how the iCalendar feed works. The current version of the website accessible via friendlylinuxplayers.org is using Grav, so it might make sense to write the files in Markdown? I need to do more research.

An advantage of this is that other content (Mastodon, iCalendar, Steam, etc.) can point to the event page.