chart: Add x_axis option.

[victorhqc]

Description

Allows hiding the x-axis for Area, Line, Bar, and Candlestick charts. The axis shows by default, but you can turn it off. Hiding the axis and labels makes the chart slightly larger because there's more space.

Screenshot

Before	After

Break Changes

- PlotAxis::new().hide_x_axis();
+ PlotAxis::new().x_axis(false);

- PlotAxis::new().hide_y_axis();
+ PlotAxis::new().y_axis(false);

How to Test

Simply use the charts as

CandlestickChart::new(data).x_axis(false)

Checklist

• I have read the CONTRIBUTING document and followed the guidelines.
• Reviewed the changes in this PR and confirmed AI generated code (If any) is accurate.
• Passed cargo run for story tests related to the changes.
• Tested macOS, Windows and Linux platforms performance (if the change is platform-specific)

Solved

[madcodelife]

Thank you!