[FEATURE REQUEST] Calendar events.

First, I would like to say that, having tried several dashboards for my selfhosted setup, this is, by far, the best dashboard for my needs. Thank you very much.

Now for my request. One feature from [homepage](https://github.com/gethomepage/homepage) that I miss is the calendar widget integration with Google Calendar, more specific, the events. In Homepage, this is done using the iCal integration (here's the [documentation](https://gethomepage.dev/latest/widgets/services/calendar/#ical)).

> iCal
>
> This custom integration allows you to show events from any calendar that supports iCal format, for example, Google Calendar (go to Settings, select specific calendar, go to Integrate calendar, copy URL from Public Address in iCal format).

Best regards.