Reverse Y Axis in Charts

[bocurmach]

Hi, for plotting charts I found that the y axis labels are not ordered like largest number on top, lowest number on bottom. I assumed this was a bug due to the rendering being done top to bottom and the y axis usually runs bottom to top.

In line 395 to 400 in src/components/chart.zig I changed this:

       //_ = plot_height;   //<-
        var result: Writer.Allocating = .init(allocator);
        const writer = &result.writer;

        if (self.y_axis.show_labels) {
            const label = y_ticks.labelForRow(plot_height - 1 - row_index) orelse "";  //<-

• removed the discard of the plot_height parameter
• reversed the index for the label row by replacing row_index with plot_height - 1 - row_index

I'm not familiar enough with the codebase to make a PR. But this worked for me. Could you have a look in to this?

Thanks!