Some basic HTML tags are supported - including <table>
, so these could be used.
For example, the below will make a table with 3 columns and 2 rows (1 being the heading).
<table style="width: 100%;">
<tr>
<th>Qty</th>
<th>Part Code</th>
<th>Description</th>
</tr>
<tr>
<td>3 off</td>
<td>AAAAAAA</td>
<td>Widget 1</td>
</tr>
</table>
For reference, a full list can be found here: Rich Content Support