Supports interactions

[erenalpaslan]

Users could be notified by chart which item touched so we need to implement a callback feature for all over the library to be able to use it in many places without repetition

options: {
        onClick: (e) => {
            const canvasPosition = Chart.helpers.getRelativePosition(e, chart);

            // Substitute the appropriate scale IDs
            const dataX = chart.scales.x.getValueForPixel(canvasPosition.x);
            const dataY = chart.scales.y.getValueForPixel(canvasPosition.y);
        }
    }