[Feature] built-in and direct support of error bar

### What problem does this feature solve?

currently error bar can only be realized by drawing three line (two horizontal and one vertical), like the official examples like [this](https://echarts.apache.org/examples/zh/editor.html?c=custom-error-bar). This is very indirect and inconvenient. Considering that error bar is used in data visualization very commonly. So is it possible to add 'errorbar' type to directly support errorbar functionality?

### What does the proposed API look like?

series: [
{
data: [[6, 7], [5.9], ..., [lower bound, upper bound]],
type: 'errorbar'
}
]