[Feature] Grid-Tables support for more advanced Table support

[George-RD]

Initial checklist

• [x] I agree to follow the code of conduct
• [x] I searched issues and discussions and couldn’t find anything (or linked relevant results below)

Problem

I would like the editor to support more advanced tables, with formatting, multiline, col/rowspan.

Solution

Create a plugin using https://github.com/adobe/remark-gridtables

for grid table support:

+-------------------+------+
| Table Headings    | Here |
+--------+----------+------+
| Sub    | Headings | Too  |
+========+=================+
| cell   | column spanning |
| spans  +---------:+------+
| rows   |   normal | cell |
+---v----+:---------------:+
|        | cells can be    |
|        | *formatted*     |
|        | **paragraphs**  |
|        | ```             |
| multi  | and contain     |
| line   | blocks          |
| cells  | ```             |
+========+=========:+======+
| footer |    cells |      |
+--------+----------+------+

Alternatives

HTML tables. However I prefer the human readable approach of the grid tables.