Add analysis specializations

[zooba]

We could do with more built-in analysis specializations for things like:

• namedtuple
• Enum
• open() (and IO classes in general)
• (plenty more...)

Users will see better IntelliSense when using these types.

[zooba]

It would also be interesting to make these an extension point (maybe Python version specific?) rather than building them completely into the core analyzer.