move wayfinder files to Flumi folder

flumi/addons/DatePicker/ICalendarView.gd

@@ -0,0 +1,19 @@
+class_name ICalendarView
+extends RefCounted
+
+## A view that dictates how a calendar should be displayed (i.e. MonthView or YearView).
+
+## The calendar that this view is a part of.
+var calendar: Calendar
+
+## When the user clicks the previous button (i.e. go to the previous year).
+func previous():
+	pass
+
+## When the user clicks the next button (i.e. go to the next year).
+func next():
+	pass
+
+## Update the view to reflect the selected date.
+func refresh():
+	pass