add table bbox extraction mechanism

docrecutils/tables.py

 from typing import List
 
-from docrecjson.elements import Cell
+from docrecjson.commontypes import Points
+from docrecjson.elements import Cell, Table
 
 import docrecutils.polygon_creations as polygon_creations
 
@@ -31,3 +32,14 @@ def get_table_coordinates_from_cells(cells: List[Cell]) -> list:
     min_y = min(all_y_values)
 
     return polygon_creations.span_polygon((min_x, max_y), (max_x, min_y))
+
+
+def get_table_bbox(table: Table):
+    """
+    :param: table: table to extract the coordinates from
+    :return: [top_left_x, top_left_y, bottom_right_x, bottom_right_y]
+    """
+    table_coordinates: Points = table.get_table_coordinates()
+    x_values = [x[0] for x in table_coordinates]
+    y_values = [x[0] for x in table_coordinates]
+    return [min(x_values), min(y_values), max(x_values), max(y_values)]