Add a worldwide list of emergency phone numbers

[ghost]

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The idea is to provide a worldwide Healthcare Emergency Numbers and Emergency Calling list of each country, and each region of countries.

[tom-milner]

I was thinking of using the user's location data to get the relevant Healthcare Emergency Number for their country.

[advayDev1]

From #930 , Should consider that covid hotlines may be different from other emergency numbers in some countries

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