Extract DataFramePresenter into a class that can be reused

[olekscode]

To inspect a DataFrame, we create a Spec table:

inspectionItems: aBuilder
	<inspectorPresentationOrder: 0 title: 'DataFrame'>

	| table |
	table := aBuilder newTable.

	table addColumn: (SpIndexTableColumn new
		title: '#';
		sortFunction: #yourself ascending;
		beNotExpandable;
		yourself).

	(self columnNames) doWithIndex: [ :headerName :columnIndex |
		table addColumn: (SpStringTableColumn
			title: headerName
			evaluated: [ :rowWithName | rowWithName at: columnIndex + 1 ]) ].

	table items: self asArrayOfRowsWithName.

	^ table

It would be nice to extract this table into a separate class DataFramePresenter that could be reused in different applications to display data frames. In future, we could make this presenter cooler by adding more features (filtering, sorting, searching, etc.)