Animation support like for python

[Tastaturtaste]

This is a feature request for supporting a animated plot like seen in this python example.
I would expect it to work by giving for x and y a slice of slices or a slice of Vecs instead of a single slice.
Given this python example:

import plotly.express as px
df = px.data.gapminder()
px.scatter(df, x="gdpPercap", y="lifeExp", animation_frame="year", animation_group="country",
           size="pop", color="continent", hover_name="country",
           log_x=True, size_max=55, range_x=[100,100000], range_y=[25,90])

A usage example could look like the following code:

use plotly::{common::Mode,Plot,Scatter};
fn main() -> Result<(),BoxErr> {
    // Four different time points
    let time = vec![1.0,2.0,3.0,4.0]; 
    // For each timepoint generate data. This could be a position for example.
    let mut x = Vec::with_capacity(time.len());
    for i in 0..time.len() {
        x.push((0..1_000).map(|x|x as f64*0.1).collect::<Vec<f64>>());
    }
    // For each timepoint evaluate some function at each position
    let mut y = Vec::with_capacity(time.len());
    for (i,xi) in x.iter().enumerate() {
        y.push(
            xi.iter().map(|xk| xk*xk + time[i]).collect::<Vec<f64>>()
        );
    }
    // Generate traces from the data
    let traces = x.into_iter().zip(y).map(|(x,y)| Scatter::new(x,y).mode(Mode::Lines)).collect::<Vec<_>>();
    // Plot the data and animate the plot with respect to time
    let mut plot = Plot::new();
    plot.add_traces(traces).animate_by(time);
    plot.show();
    Ok(())
}