feature: support dataframe for package data

[wpbonelli]

Since pandas is now a core requirement it makes sense to support dataframes where recarrays or lists of lists/tuples are currently required.

Context:

---

^{Originally posted by kimlee100 September 15, 2022}
Hello,

I rewriting MNW2 package by modifying some wells. Following the MNW2 example, I converted to numpy array both node_data and stress_period_data, however when I try to create MNW2 object it is giving an error that node_data has no dtype. Checked data types and they are quite similar to the ones in the example. Can you suggest why it is not creating an object?

---

You have to convert the node data to a recarray. From the error node_data is a dataframe so do the following:

node_data = node_data.to_records()

Originally posted by @p-ortega in #1541 (comment)