markup/goldmark: Add Position to CodeblockContext

But note that this is not particulary fast and the recommendad usage is error logging only.

Updates #9574

markup/converter/hooks/hooks.go

@@ -17,6 +17,7 @@ import (
 	"io"
 
 	"github.com/gohugoio/hugo/common/hugio"
+	"github.com/gohugoio/hugo/common/text"
 	"github.com/gohugoio/hugo/identity"
 	"github.com/gohugoio/hugo/markup/internal/attributes"
 )
@@ -37,6 +38,7 @@ type LinkContext interface {
 
 type CodeblockContext interface {
 	AttributesProvider
+	text.Positioner
 	Options() map[string]interface{}
 	Lang() string
 	Code() string
@@ -59,6 +61,10 @@ type CodeBlockRenderer interface {
 	identity.Provider
 }
 
+type IsDefaultCodeBlockRendererProvider interface {
+	IsDefaultCodeBlockRenderer() bool
+}
+
 // HeadingContext contains accessors to all attributes that a HeadingRenderer
 // can use to render a heading.
 type HeadingContext interface {
@@ -84,6 +90,14 @@ type HeadingRenderer interface {
 	identity.Provider
 }
 
+// ElementPositionRevolver provides a way to resolve the start Position
+// of a markdown element in the original source document.
+// This may be both slow and aproximate, so should only be
+// used for error logging.
+type ElementPositionRevolver interface {
+	ResolvePosition(ctx interface{}) text.Position
+}
+
 type RendererType int
 
 const (