Feature: Implement iCal integration for calendar, improve styling (#2376)

* Feature: Implement iCal integration, improve calendar/agenda styling

* Delete calendar.jsx

* Calendar proxy handler

* code style

* Add some basic error handling

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Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

public/locales/en/common.json

@@ -765,6 +765,7 @@
         "inCinemas": "In cinemas",
         "physicalRelease": "Physical release",
         "digitalRelease": "Digital release",
-        "noEventsToday": "No events for today!"
+        "noEventsToday": "No events for today!",
+        "noEventsFound": "No events found"
     }
 }