Plot image in grayscale

[grst]

scanpy.pl.spatial has a argument bw=True that allows to plot a background image in grayscale. I find that useful when plotting shapes on top of an image because the pink H&E image can distract from the color scale of the shapes.

Would it be worth adding such a functionality to spatialdata_plot.pl.render_imges? Or would you recommend adding a b/w-transformed image to the spatialdata object instead?