[FluentCalendar] Use provided Culture for calendar operations

[vrassouli]

Pull Request

📖 Description

As reported in issue #1854, FluentCalendar (and FluentDatePicker) didn't use Culture for calendar operations and calculations.
It's now fixed, and the calendar now supports every culture correctly.

🎫 Issues

#1854

👩‍💻 Reviewer Notes

📑 Test Plan

✅ Checklist

General

• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have added Unit Tests for my new compontent
• I have modified an existing component
• I have validate Unit Tests for an existing component

[dvoituron]

I've already posted a few comments (first quick check).

I'm afraid of the number of "small" changes in the code base.
E.g. Year = year.GetDay(_calendar.Culture) == 1 && year.GetMonth(_calendar.Culture) == 1 ? year : year.StartOfYear(_calendar.Culture);

Could you add unit tests to validate your changes and new features?

[vrassouli]

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[vrassouli]

I've already posted a few comments (first quick check).

I'm afraid of the number of "small" changes in the code base. E.g. Year = year.GetDay(_calendar.Culture) == 1 && year.GetMonth(_calendar.Culture) == 1 ? year : year.StartOfYear(_calendar.Culture);

Could you add unit tests to validate your changes and new features?

I've added some tests to ensure correct functionality by using Culture.

And one thing more, I noticed that FluentCalendar_DayValues of the FluentCalendarTests is wrong. Although it is passing, but it's not correct. It looks for calendar.FindAll(".date") and loops through the value to test the result. but the value contains nothing.

[dvoituron]

Great job. Thanks.