Ability to make points or bar sections editable (ideally with drag and drop)

Something like this:

Similar to what is possible with shapes when editable=True is set in the config: https://github.com/plotly/plotly.js/blob/master/src/plot_api/plot_config.js#L47

Changing the position of the point (or bar section) should:

• modify the underlying traces
• trigger an event like restyle or relayout
• be restricted based on the current state of the graph. In the example of the screenshot, it should only be possible that the bar region is moved to "China" or "Canada" and their respective x positions, since those are the available values. Similarly, the y position would be determined by the current "height" of the bar the region is moved to.

从 src/plot_api/plot_config.js 中的 editable-shapes 配置开始，并将其行为与所请求的点和条形区段编辑进行比较。定义位置变化如何更新底层 traces、触发 restyle 或 relayout 事件，并遵循图表可用的分类值和条形高度。完成意味着这些交互在所述限制下能够正常工作。