[new feature] can add axis text labels in multi line

[loclv]

Just like this stack-overflow - questions - d3-line-chart-axis-text-labels-in-multi-line, i think this new feature is really useful!

You can add some properties in AxisConfig to config axis label.

Thank you for being awesome package!

[Carl-Binneman]

Upvoting as i have timestamps on my x axis and need line breaks to be respected.