WP-Builder: Support date picker

[bangank36]

Summary

• Implement the datepicker with gutenberg control
• The control is supported out of the box so we can just grab the current control tester of jsonforms

Update

• Current Gutenberg datepicker has some issue

1. There is not built-in month and year picker yet, they are only available on datetimepicker component
2. No range support

Therefore I will consider using this https://reactdatepicker.com/#example-monthyear-dropdown instead and see if it work, the whole inline component will be rendered on the popup

1. Note that date-fns is used for format date, we need a custom createOnChangeHandler and custom getData to parse value from Date object to correct string

Reference

#3

[bangank36]

Update

• Relevant PR has been merge with a basic datepicker field, there is not support for date range just yet
• Date range prop for React Datepicker https://reactdatepicker.com/#example-date-range