Add klines chart type

[davseby]

Hi, really appreciate the work that has been put in, it looks amazing as it is! I think the package could also include the klines chart type for financial applications.

Base idea:
The chart should take an array of structures containing a timestamp and a slice of 4 values (open, high, low, close). The base configuration should color the sticks either green or red, based on the open and close prices. If open is greater than close, then red, otherwise green.

https://www.mexc.com/learn/article/17827791509940

[jentfoo]

Thank you for the recommendation! I completely agree this would be a valuable addition. I have recently added a couple other chart types and I am happy to add this one too when I am able.