Studio message text syntaxes should be documented

[1mgtheboss]

It seems studio message text syntaxes are not properly listed in the documentation, on-site or github. It took me around 30 minutes to find out that a user response variable can be accessed as {{responses.question_1}}. If the studio message text syntaxes are documented, it will be easier for developers to edit scripts on the studio. I am editing the onboarding script now. I would like to know the syntax for the user's name i.e. the equivalent of message.original_message.data.personDisplayName.