Day/Schedule view

[marcusolsson]

This proposes to add a Schedule view which lays out calendar events as a vertical feed to make it easier to see upcoming events during the day.

Here's an example from Google Calendar:

Discussed in https://github.com/marcusolsson/grafana-calendar-panel/discussions/38

^{Originally posted by fmuell2 May 17, 2021}
When using the Grafana Timerange Today the calender shows the whole week. In our usecase its hard to read the entry titels. It would be better if there was a possiblity to show only one day when the timerange Today is selected

[mikhail-vl]

Day Schedule view will be implemented in #55.