Hmm, just thinking about the technical side here..
That’d mean doing a full text search on every resource content, other resource fields and all TV values. Looking through snippets for $modx->getChunk(’chunkname’). Looking through TV input options.
Besides that it will take a long time to search all that even on a small site, there’s no way to get all the references to chunks. You’d probably need to account for [[$chunk? &inputoption=`value`]] too. And what if you have TV set up which has the names of chunks as values, which you call as [[$[[*tvname]]]] ? Complicating things there again..
It would be easier to find resources using a template (in a snippet:
$tpl = $modx->getObject('modTemplate',$tplname); $ress = $tpl->getMany('Resources');
(may be Resource in the last call, unsure of exact atm) - and then making that output with a plugin.
But here’s a question: do you really want to view the hundreds of resources using your "News" template next year? What’s the benefit in that?