Add support for fuel prices on a per-country basis

[killereks]

Problem Statement

• Add support for different countries with a fuel price API.
  • Fuel prices vary per country, so the API must account for this.
  • Ensure that the fuel prices are displayed in the local currency of the origin country once this is implemented to avoid confusing the user.
• Could support a fixed number of countries (UK, US, France, Germany, Canada) with separate APIs, or use one API that supports a wide range of countries.