Split parse and render for Goldmark

This also speeds up situations where you only need the fragments/toc and not the rendered content, e.g. Related
with fragments type indexing:

```bash

name            old time/op    new time/op    delta
RelatedSite-10    12.3ms ± 2%    10.7ms ± 1%  -12.95%  (p=0.029 n=4+4)

name            old alloc/op   new alloc/op   delta
RelatedSite-10    38.6MB ± 0%    38.2MB ± 0%   -1.08%  (p=0.029 n=4+4)

name            old allocs/op  new allocs/op  delta
RelatedSite-10      117k ± 0%      115k ± 0%   -1.36%  (p=0.029 n=4+4)
```

Fixes #10750

1 files changed, 8 insertions, 1 deletions

diff --git a/resources/page/page_nop.go b/resources/page/page_nop.go
index 8946926a2..c04c019fe 100644
--- a/resources/page/page_nop.go
+++ b/resources/page/page_nop.go
@@ -538,7 +538,14 @@ func (p *nopPage) HeadingsFiltered(context.Context) tableofcontents.Headings {
 
 type nopContentRenderer int
 
-func (r *nopContentRenderer) RenderContent(ctx context.Context, content []byte, renderTOC bool) (converter.Result, error) {
+func (r *nopContentRenderer) ParseAndRenderContent(ctx context.Context, content []byte, renderTOC bool) (converter.ResultRender, error) {
 	b := &bytes.Buffer{}
 	return b, nil
 }
+
+func (r *nopContentRenderer) ParseContent(ctx context.Context, content []byte) (converter.ResultParse, bool, error) {
+	return nil, false, nil
+}
+func (r *nopContentRenderer) RenderContent(ctx context.Context, content []byte, doc any) (converter.ResultRender, bool, error) {
+	return nil, false, nil
+}