Add ExtendedDatePicker

[abdullah-original]

Thanks for your contribution! This is a template that can make it easier when submitting your contribution:

Your Project: ExtendedDatePicker
Project URL: https://github.com/abdullah-original/ExtendedDatePicker
Category: Date & Time
Description: A SwiftUI DatePicker with advanced options and modes.

Inclusion requirements:

• Has 50 GitHub stargazers or more
• Only one project/change is in this pull request
• Isn't an archived project
• Has more than one contributor
• Has unit tests, integration tests or UI tests
• Addition in alphabetical order (bottom of category)
• Supports iOS 12 / tvOS 10 or later
• Supports Swift 4 or later
• Has a commit from less than 2 years ago
• Has a clear README in English

❤️ Awesome iOS Contributors

[vsouza]

@abdullah-original
We cannot merge your PR yet until you fill all of the contribution guideline requirements. Feel free to open PR once it is ready.

Please check our CONTRIBUTION GUIDELINES