Add a context type for scenario information

[Fryuni]

Along with the provided context types that expose functionalities of the Cucumber World object, we could provide one with information about the scenario. It could contain:

• Name of the feature
• Name of the scenario
• Location of the scenario (file and line)
• Tags

Additionally, the tags could be exposed as both tags and smartTags that automatically parses the tags such as:

# Flag tags, which can be checked for presence as a boolean
@foo
@bar

# Arg tags, which can be retrieved as a list of arguments
@mode(A)
@mode(B)

# Property tags, which can be retrieved as an object
@config({
  foo: 'bar',
})