.orcd_point_estimates: Add point estimates for orchard plot
Description
Note: Point estimate previously used 'geom_pointrange',
plotting the estimate and prediction interval at the same time.
However, that was less flexible.
Now PI are plotted with 'geom_linerange' and point estimate with 'geom_point'.
Usage
.orcd_point_estimates(mod_table, colour, trunk.size)