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.

Comece pela configuração de editable-shapes em src/plot_api/plot_config.js e compare seu comportamento com a edição solicitada de pontos e seções de barras. Defina como as alterações de posição atualizam os traces subjacentes, disparam eventos de restyle ou relayout e respeitam os valores categóricos disponíveis e as alturas das barras do gráfico. A tarefa estará concluída quando essas interações funcionarem com as restrições especificadas.