Add path, kind and lang to content front matter

Note that none of these can be set via cascade (you will get an error)

Fixes #11544

hugolib/site_render.go

@@ -129,7 +129,7 @@ func pageRenderer(
 			continue
 		}
 
-		if p.m.buildConfig.PublishResources {
+		if p.m.pageConfig.Build.PublishResources {
 			if err := p.renderResources(); err != nil {
 				s.SendError(p.errorf(err, "failed to render page resources"))
 				continue