[Feature] Add Funnel Direction Option

[Metarock]

Is your feature request related to a problem? Please describe.
Currently, the funnel chart only supports a vertical orientation (top-to-bottom). In certain cases, such as dashboards with limited vertical space or horizontally oriented data flows.

Describe the solution you'd like
I would like to propose adding a configuration option to funnel charts:

funnel: {
  direction: 'vertical' | 'horizontal' //default: "vertical"
}

Describe alternatives you've considered
Alternatives I've considered:

• rotating the chart using css transforms: However this breaks the layout calculations, labels, and tooltip positioniong

Additional context
Add any other context or screenshots about the feature request here.

Here is an example from vue-funnel-graph-js