Add Hebrew calendar support

[dalelotts]

The Hebrew or Jewish calendar is a lunisolar calendar. The Hebrew lunar year is about eleven days shorter than the solar year and uses the 19-year cycle to bring it into line with the solar year, with the addition of an intercalary month every two or three years, for a total of seven times per 19 years.

In Israel, Hebrew calendar used not only for religious purposes but frequently - as an official calendar for civil purposes. As a rule, dates are shown in right-to-left direction and with Hebrew numerals instead of European digits.

Implementation steps:

1. Implement model-providers for each view.
2. Create a module that exports the date/time picker using the Hebrew model providers