Hello!
I have added ICS integration support, so now you can add your School Tools calendar in any of your prefered calendars!
I started by making the job that generates the ICS per se. After that, i added API routes to integrate around it. I then integrated it into the frontend under /settings/calendar. There is also a tooltip in the normal calendar page!*

The way ICS feeds work is basically every time there is a DB edit (such as class creation for example) the user is marked as ‘dirty’. Then, the ICS job that runs every five minutes, gets every dirty user and updates their ICS feeds. It doesn’t really matter that it isn’t updated automatically, since the majority of calendar providers have a long TTL for ICS subscriptions. (Google Calendar has ~12h TTL for example!)

I also added a README.

*Frontend integration was heavily AI assisted, but i supervised it and edited some things to ensure code quality.