Rename Data to Variable

[NiklasRosenstein]

Is your feature request related to a problem? Please describe.

The name "data" is too generic, and "variable" expresses more closely what the datastructure resembles (information about a value declaration and/or assignment to a name). We already have a semantic hint that could express if the variable is actually a constant.

Describe the solution you'd like

N/A

Describe alternatives you've considered

• "value", but it does not convey that information about the name of the value is available as well. Also a pure variable declaration with a type hint does not even have a value so in that case the name would make no sense at all.