Add instructions for adding country in README.md

[brittanyrw]

Let's add a new key to the Emoji Card object for country. This will be for the country or countries that created the show, movie or musical.

The EmojiCard object currently looks like this:

{
  title: "Beauty and the Beast",
  emojiImgs: "🏰🥀🎶📚🕰️",
  genres: ["animation", "family", "fantasy"],
  itemLink: "https://www.imdb.com/title/tt0101414/",
  type: "movie",
  year: 1991
}

With this new key, it should look like this:

{
  title: "Beauty and the Beast",
  emojiImgs: "🏰🥀🎶📚🕰️",
  genres: ["animation", "family", "fantasy"],
  itemLink: "https://www.imdb.com/title/tt0101414/",
  type: "movie",
  country: ["United States"],
  year: 1991
}

The country should have an array as the value since some movies/shows will have multiple countries involved.

To Do:
Add instructions in the README and other documentation markdown files for adding a country.

1. Add country to all of the example objects.
2. Add a section for country in the Card Overview. Include instructions on where to find country info for shows. This info can be found in Wikipedia in the sidebar. Or on the IMDB page in the Details section.

Wikipedia examples:

IMDB example:

3. Include an example in the new country section in the card overview that shows multiple countries like:

country: ["United Kingdom", "Netherlands", "France", "United States"]

4. Also specify that the country name should be the full name and not abbreviations so instead of UK it should be United Kingdom.