Add Bokeh gridplot/layout integration about chartify HOT 3 OPEN

import chartify
from bokeh.layouts import gridplot
from bokeh.io import show

chart_1 = chartify.Chart(layout='slide_50%').set_title('Chart 1')
chart_2 = chartify.Chart(layout='slide_50%').set_title('Chart 2')
chart_3 = chartify.Chart().set_title('Chart 3')

# Create a list of figure objects to pass to gridplot
chart_figures = [chart.figure for chart in (chart_1, chart_2, chart_3)]

# make a grid
grid = gridplot(chart_figures, ncols=2,)

# show the results
show(grid)