Add widget with text input (no dropdown list)

[quang-le]

Hi,

Thanks for creating this library!

I created a Widget that allows user to manually type their phone number, as some people don't like dropdown lists.

Since I added some files, I also propose to re-organize the folder structure, eg: putting the flags in an asset folder and using an /src folder for the widgets.

I created a PhoneService class to handle the calls to libphonenumber, but I only used it in the new Widget (I didn't touch your code).

I wrote unit tests for the new Widget. I edited your test to replace async/await syntax with then(), as the test was not working.

I hope you'll find this feature interesting. I'll happily make changes if needed.

[niinyarko]

Hi @quang-le thanks for making this request. Will review and merge.

[quang-le]

Thanks for merging. FYI, you need to update the pubspec.yaml file in the example, so it doesn't point to my repo anymore

[niinyarko]

@quang-le done. Thank you.