Support Confluence tables for theme developers

As a theme developer, I want support for Confluence tables, so I can use and style them in my theme.

Acceptance criteria

• Improve HTML transformation of tables

• Tables should follow the component model.

• Both, header rows and header columns should be implemented using the <th> element within a <tr> element.

• The display mode option “fixed” prepends a column into the table where each cell contains a counter from 1 to <amount of rows>.

• The table components wrapper should include a style attribute with the table width style="--width: <value px>"

• The rendering of <col> elements inside <colgroup> (in case a custom column width is configured in Confluence) should be updated from style="--width: <value px>" to style="width: <value px>"

Out of scope

• Custom block size and width adjustments need to be implemented by the theme