`background_color_threshold` does not work with the `plot` method in the `ArrayGlyph` class

[MAfarrag]

Describe the bug
the background_color_threshold parameters is not used inside the plot mehtod in the ArrayGlyph class to change the color of the plotted values in each cells.
The same parameter is used in the method animate, as the method checks the value of each cell and compare it with the parameter then decide on the color of the value .
This comparison in the animate function is done in the update_cell_value function which does not loop over the cells but the FuncAnimation function does , and for the plot method we need to implement the loop to properly compare the parameter with each value.

To Reproduce

• plot any array with the

display_cell_value = True
num_size = 8
background_color_threshold = None

the displayed values will be white no matter what.

in the _plot_text function

@staticmethod
    def _plot_text(
        ax: Axes, arr: np.ndarray, indices, default_options_dict: dict
    ) -> list:
        #TODO: the `background_color_threshold` parameter should be used here the same way as in the animate function
        # to change the color of the text based on the value of the cell.
        add_text = lambda elem: ax.text(
            elem[1],
            elem[0],
            round(arr[elem[0], elem[1]], 2),
            ha="center",
            va="center",
            color="w",
            fontsize=default_options_dict["num_size"],
        )
        return list(map(add_text, indices))

the color should be decided based on the value of each cell, where the cell value is vals[x]

text_colors=("white", "black")
text_colors[int(im.norm(vals[x]) > background_color_threshold)]

Expected behavior
the displayed values should switch to black when the value of the cell is greater than the threshold parameter.

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