Add structure isometric rendering (PR Suggestion for contributors)

[Tslat]

Use the new ISO printing functionality to capture structure isometric renders for the wiki.
Would need to better generify & extend the iso printing function, but it should otherwise be usable

Would be best implemented as a command extension to /wikihelper iso
E.G.
/wikihelper iso <entity|block|item|structure|etc> <id>

This would require investigation into the best way to batch block renders, but it's definitely possible with some work