Create metropolitan-area.json (#1)

[kempy007]

• Create metropolitan-area.json

Data compiled from https://wikitravel.org/en/Metropolitan_Area_Airport_Codes

[alexander-san]

Hi @kempy007, appreciate the idea and initiative for this contribution.
Do you have a second source for the Metropolitan Area Airport Codes.
And how do you want to handle ambiguous Met Area Codes such as NYC which sometimes includes HPN, however, for most search engine purposes is excluded...