Improve CSV parsing in DataFrame

[Merlin04]

Kobra/src/blocks/DataFrame.ts

Line 18 in 73ad2c1

let data: any[] = dataStr.split("\n");

Right now, we use String.split to parse CSVs, which isn't the best way to do it because it doesn't handle escaped values, newlines, or other variations on the CSV format (like TSV). We should use something like Papa Parse (what I use in better-react-spreadsheet) to do parsing for us.

[Merlin04]

Fixed in #134