fix: Fixed Sage 10 view resolving as a child theme

[LiamMartens]

When using a Sage theme as a child theme of a non Acorn theme the templates aren't being picked up correctly because they are being parsed as blade templates This commit fixes that by treating non-blade templates "as-is"

Secondly - in this instance - when used as a child template we should probably use the stylesheet directory method otherwise the index.php file of the parent theme is included.