Add all config to docshelper.json

Also consolidate so the mediaTypes and outputFormats are listed once only.

Fixes #11328

media/docshelper.go

@@ -1,13 +0,0 @@
-package media
-
-import (
-	"github.com/gohugoio/hugo/docshelper"
-)
-
-// This is is just some helpers used to create some JSON used in the Hugo docs.
-func init() {
-	docsProvider := func() docshelper.DocProvider {
-		return docshelper.DocProvider{"media": map[string]any{"types": DefaultTypes}}
-	}
-	docshelper.AddDocProviderFunc(docsProvider)
-}