stack_cross: Arrange plots crosswise horizontally or vertically

Description

The stack_cross function is derived from stack_discrete() and allows for different layout ordering indices within a single layout.

Two aliases are provided for convenience:

stack_crossv: A special case of stack_cross that sets direction = "v" for vertical alignment.
stack_crossh: A special case of stack_cross that sets direction = "h" for horizontal alignment.

stack_cross(direction, data = NULL, ..., theme = NULL, sizes = NA)
stack_crossv(data = NULL, ...)
stack_crossh(data = NULL, ...)

direction: A string indicating the direction of the stack layout, either "h"(horizontal) or "v"(vertical).
data: Default dataset to use for the layout. If not specified, it must be supplied in each plot added to the layout, fortify_matrix() will be used to convert the data to a matrix.
...: Additional arguments passed to fortify_matrix().
theme: A theme() object used to customize various elements of the layout, including guides, title, subtitle, caption, margins, panel.border, and background. By default, the theme will inherit from the parent layout. It also controls the panel spacing for all plots in the layout.
sizes: A numeric value or a unit object. When used for the quad_layout() annotation, it must be of length 1. When used in the stack_layout() with a nested quad_layout(), it should be of length 3, specifying the relative heights (for direction = "h") or widths (for direction = "v") to be applied to the layout.