add_waterfall_bars: Add waterfall style bars to the column chart
In tidycharts: Generate Tidy Charts Inspired by 'IBCS'

Add waterfall style bars to the column chart

add_waterfall_bars(
  svg_string,
  df,
  x,
  series,
  bar_width,
  styles = NULL,
  pos_color = "rgb(64,64,64)",
  neg_color = "black",
  add_result_bar = TRUE,
  result_bar_pos = "1",
  positive_prefix = "",
  result_bar_color = NULL,
  result_title = NULL,
  ref_value = 0,
  translate_vec = c(0, 0)
)

`svg_string`	the svg string to br appended, need to be finalized after
`df`	data to be plotted - data frame in wide format
`x`	vector to be on x axis
`series`	character vector of column names representing series to split bars by it
`bar_width`	the width of plotted bar
`styles`	vector of styles of the bars
`pos_color`	color to be associated with positive values (in string format)
`neg_color`	color to be associated with negative values (in string format)
`add_result_bar`	boolean flag to add result bar as the last bar or not.
`result_bar_pos`	flag indicating position of the result bar. 1 - bar offset 1/9 category width right from the last bar. 2 - result bar as completely new bar. If add_result_bar is false, it is ignored.
`positive_prefix`	how to indicate positive value, ie. "+" or ""(empty string).
`result_bar_color`	color of result bar. If add_result_bar is false, it is ignored.
`result_title`	title of result bar to be on x axis. If add_result_bar is false, it is ignored.
`ref_value`	first bar starts from this value, intended to be used with add_first_bar function.
`translate_vec`	2 element translation vector. By setting this parameter you can translate bars and legend.