Move DnD shared prompt assets into helper package

internal/modules/chunk/dnd/scenes/scriptorium_assets_test.go

@@ -8,7 +8,6 @@ import (
 	"time"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets"
 	"gitea.maximumdirect.net/eric/scriptorium"
 )
 
@@ -90,9 +89,6 @@ func TestScriptoriumPromptDiagnosticsOmitRawMaterials(t *testing.T) {
 func prepareScenesPrompt(t *testing.T, transcript []byte, players string, party string, glossary string) *scriptorium.PreparedRun {
 	t.Helper()
 	registry := llm.NewAssetRegistry()
-	if err := sharedassets.Register(registry); err != nil {
-		t.Fatalf("register shared prompt assets: %v", err)
-	}
 	if err := RegisterPromptAssets(registry); err != nil {
 		t.Fatalf("register scene prompt assets: %v", err)
 	}