Create the "Expand" bridge macro

[snazare]

Please create the "Expand" bridge macro, compatible with the Confluence Expand macro: https://confluence.atlassian.com/doc/expand-macro-223222352.html

Please note that XWiki already has a similar macro: https://extensions.xwiki.org/xwiki/bin/view/Extension/Document%20Accordion%20Macro/

Parameters:

Parameter	Default	Description
Title	Click here to expand...	Defines the text that appears next to the expand/collapse icon.

[clemdee]

Expand macro bridge implemented.