[Enhancement] Rainbow columns

[MahouShoujoMivutilde]

Just saw rainbow_csv and thought highlighting different columns based on order instead of value type (which probably will be the same in a given column) might be a better default.

What do you think?

[markstos]

There's already another tree sitter grammar just for Rainbow CSV parsing:

https://github.com/weartist/rainbow-csv-tree-sitter

The related zed-rainbow-csv project provides the highlights.scm file to use:

; Literals
(second)@keyword
(third)@function.method
(fourth)@number
(fifth)@comment
(sixth)@type
(seventh)@operator

From looking at the code above, we can see how it works: The first column is not colored, and the second is colored as a keyword, the third as a method and so on.

I'd have to read their source to see what happens after the seventh column, lol.