Create a Confluence bridge macro for Microsoft Stream Macro

[oanalavinia]

Right now there is a Microsoft Stream Macro that gives the possibility to embed videos, see #69, but this is not compatible with the Confluence macro https://marketplace.atlassian.com/apps/1224419/microsoft-stream-for-confluence?tab=overview&hosting=cloud (see #69 (comment))

[oanalavinia]

The macro should be added after https://jira.xwiki.org/browse/CONFLUENCE-105 is fixed, since right now the confluence migration will not copy the url macro parameter, which is mandatory.

Note that a bridge macro is needed in order to be compatible with the confluence macro name net-presago-stream-macro

[oanalavinia]

https://jira.xwiki.org/browse/CONFLUENCE-105 has also been closed