Helm must be installed to use the charts. Please refer to Helm's documentation to get started.
Once Helm is set up properly, add the repo as follows:
helm repo add yungwood https://yungwood.github.io/helm-charts/
You can then run helm search repo yungwood
to see the charts.
helm install --name your-release yungwood/ical-filter-proxy
Also see artifact hub for a complete list.