Table where items can span multiple rows and columns

[wasi-master]

What I want:

+------------+------------+-----------+
| Header 1   | Header 2   | Header 3  |
+============+============+===========+
| body row 1 | column 2   | column 3  |
+------------+------------+-----------+
| body row 2 | Cells may span columns.|
+------------+------------+-----------+
| body row 3 | Cells may  | Cells     |
+------------+ span rows. | contain   |
| body row 4 |            | blocks.   |
+------------+------------+-----------+

How could I achieve a table like that with rich?

Context: I am making rich-rst and reStructuredText tables support this format so I was hoping to show this somehow inside the terminal.

[codenotworking]

There is already an open issue for this: #164