add icalendar

[jacadzaca]

ℹ️ Repository information

The repository has:

• At least three issues with the good first issue label.
• At least 10 contributors.
• Detailed setup instructions for the project.
• CONTRIBUTING.rst
• Actively maintained.

Here's the link to issues - https://github.com/collective/icalendar/issues

[lucavallin]

Hey @jacadzaca ! I tried to contribute to this repo as well but I haven't seen any activity in the last few months. I decided to fork it to keep it alive. Please see https://github.com/lucavallin/gfi and feel free to open a pull request there. At this time I am setting up the hosting and cleaning up the code. If you're up for it, I could use some help to convert the app from Nuxt.js & Python to Next.js & Typescript.