[docs] moved into folders

docs/user/tools/docs.user.tools.calendar.md

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+---
+{
+	"_label": "Calendar"
+}
+---
+The Calendar is a tool where you can create and share Events and also see auto-generated events from the system.
+
+### Repeating Events
+
+You can set events to repeat on every interval by Checking the "Repeat This Event" 
+as shown in the example.
+
+![Set Repeat This Event](img/event-1.png)
+
+You can see the repeat events by switching back to the calendar.
+
+![Event Repeated in Calendar](img/event-2.png)
+
+### Reminders
+
+You will also get a daily digest of all upcoming events for the day if any if the reminder field is checked.