Add country code in each Country object

[philippeauriach]

Use case for the feature

Currently countries are listed in key/values with the country code being used as key, but not present in the value object.
This leads to problems when, for example, allowing a user to choose from a list of countries, it is easy to get all countries using Object.values, but then each value does not have its own code.

I would love to make a PR, but don't know where to start? I think we could just update the script (not the data file), to map over all entries just to include the code.

[dmythro]

Hi @philippeauriach. Feel free to use Object.entries() for that kind of loops. Otherwise Country objects will get bigger in size.

[philippeauriach]

Yes but then, later, we handle just a Country object without the code, otherwise we need to reconstruct a new object from the country and code prop. Seems overkill for a simple property that won't take that much of size in my opinion.
But ok thanks anyway

[dmythro]

@philippeauriach it makes total sense, have it in my list as well. But thinking rather on a getter that returns an object of a Country class, with code and maybe some additional features in future. Need to finish that TypeScript migration already. Mainly, not merging that because have doubts on some future structures. You may check the PR #83 as well, by the way.