adding context types to get and listen methods

[rami-monday]

overriding settings type depending on you app settings configured in dev center

LISTEN: Typescript override the context with AppFeature[type]Context

GET: Context type without overriding well show the common context type for all feature types

LISTEN: Context type without overriding well show the common context type for all feature types

GET: javascript overriding context type by passing appFeatureType as an option

GET: javascript list of app feature types to get context type based on