Better display of DataFrame in IEnumerable Visualizer

**Is your feature request related to a problem? Please describe.**
Currently, it is quite inconvenient to look at data inside of a DataFrame during debugging. It is possible to view the data via the "Results View" of the "Rows"/"Columns" properties, but with a lot of data, this gets inconvenient

Visual Studio added the [IEnumerable Visualizer](https://devblogs.microsoft.com/visualstudio/view-net-collections-with-the-new-ienumerable-debugger-visualizer/) a while ago and I think it could significantly increase the debug experience, since it also allows to export data to CSV.

Currently, it is possible to have a view like this of the data:


This is not ideal, as in every row the whole DataFrame is inserted in the `._dataFrame` column.

**Describe the solution you'd like**
I'd like to see better support for the IEnumerable Visualizer, so when viewing rows in it, every column has its own field.

**Describe alternatives you've considered**
If this is impractical, it would also help to just remove the `_dataFrame` column from the IEnumerable view to make CSV exports a lot more digestable.