Provide the initial scrolled month and infinite bidirectional scrolling

[mfbx9da4]

We would like to allow the user to navigate infinitely into the future and into the past. We would also likely provide an initial scrolled month. We are achieving this by doing the following

• Set the visibleDateRange to (Now - 10 years)...(Now + 10 Years)
• After CalendarView.init() call self.scroll(toMonthContaining: someDate, scrollPosition: .centered, animated: false)

This is not ideal because

• We don't want to arbitrarily bound the navigation by 20 years
• Since we are using the SwiftUI variant we have to modify the internals CalendarView.init() to achieve this initial scroll position

Do the maintainers of this project condone our current approach or would they suggest something else?

Thanks for your hard work, the performance is excellent.

[bryankeller]

@mfbx9da4 can you just add +/- a 100,000 years or something? HorizonCalendar was built to scale to that use case!

As for the SwiftUI scroll-to stuff, I'm working on support for that now!