Fix todoist calendar events (#39197)
Fix todoist calendar events (#39197)

Updated the calendar event dict to contain a `summary` key so that the
title will display on the calendar panel.  Also update the start/end
date to not include time information if the event is all day so that it
renders as an all day event on the calendar panel.
w1ll1am23/home-assistant,balloob/home-assistant,tboyce1/home-assistant,sander76/home-assistant,jawilson/home-assistant,rohitranjan1991/home-assistant,nkgilley/home-assistant,FreekingDean/home-assistant,rohitranjan1991/home-assistant,home-assistant/home-assistant,Danielhiversen/home-assistant,tboyce021/home-assistant,GenericStudent/home-assistant,kennedyshead/home-assistant,sander76/home-assistant,soldag/home-assistant,toddeye/home-assistant,tchellomello/home-assistant,tboyce021/home-assistant,tchellomello/home-assistant,partofthething/home-assistant,lukas-hetzenecker/home-assistant,tboyce1/home-assistant,sdague/home-assistant,tboyce1/home-assistant,mezz64/home-assistant,adrienbrault/home-assistant,balloob/home-assistant,GenericStudent/home-assistant,jawilson/home-assistant,kennedyshead/home-assistant,w1ll1am23/home-assistant,turbokongen/home-assistant,Danielhiversen/home-assistant,mezz64/home-assistant,adrienbrault/home-assistant,home-assistant/home-assistant,turbokongen/home-assistant,sdague/home-assistant,lukas-hetzenecker/home-assistant,nkgilley/home-assistant,balloob/home-assistant,aronsky/home-assistant,toddeye/home-assistant,rohitranjan1991/home-assistant,tboyce1/home-assistant,FreekingDean/home-assistant,soldag/home-assistant,aronsky/home-assistant,partofthething/home-assistant