Streamline the data loading process

As per the Teams convo, making a few issues here.

Compared to arguably the most popular data analysis tool of Pandas + Matplotlib, QtCharts took a loooot of code to be able graph data from a simple CSV.

In Python, it will take probably 5 lines of code, tops.
In QtCharts, the same basic action requires upwards of 200 lines of code. (A custom CSV parser, a QAbstractItemModel, ChartView, Lines/ScatterPlots, Axes, XYModelMapper, probably something else I'm forgetting...).

A simple CSV to ItemModel and CSV to ListModel approach would be useful, with header access (not just column index).