Ranges, Tuples, Sets

[s2t2]

A student suggests we should talk about lists vs tuples.

Let's split datatypes into two sections - basic vs container (see tables in datatypes overview).

In container datatypes section, we can add chapters for ranges, tuples, and sets.

Can use some content about tuples and sets from here:
https://nbviewer.org/github/prof-rossetti/intro-to-python/blob/9dae828b7e64ff2beeda4a8371cec6a4a6c9b92e/notes/python/datatypes/Intermediate_Datatypes.ipynb#L49

add to table in datatypes overview:

| Range  | An immutable sequence of numbers, from start to stop. | `range(1,10)`|