Create the enum MimeType

[WebDevJL]

Source: https://docs.google.com/spreadsheets/d/1ukWyE60QKQlRy-6mvT9royITgtD80gInOMSEOHHsBg4

[WebDevJL]

See #45 for the sub enum per parent mime type.

Ex : application/javascript where application is parent and javascript is child.