Fix missing index with only document children

Resoles #2722

CHANGELOG.md

@@ -11,6 +11,7 @@
 -   Correctly handle external link resolver link text when referencing an external symbol, #2700.
 -   Big integer literals are now supported as default values, #2721.
 -   Corrected handling of `@link` tags present in comments at the start of source files.
+-   The index will now display when a module only contains documents, #2722.
 -   `ReflectionSymbolId.pos` no longer references the position _before_ any doc comments for a symbol.
     This could cause typedoc-plugin-dt-links to produce links which didn't go to the expected location in a file.
 

src/lib/output/themes/default/templates/reflection.tsx

@@ -75,7 +75,7 @@ export function reflectionTemplate(context: DefaultThemeRenderContext, props: Pa
                     {!props.model.signatures && context.memberSources(props.model)}
                 </>
             )}
-            {!!props.model.children?.length && context.index(props.model)}
+            {!!props.model.childrenIncludingDocuments?.length && context.index(props.model)}
             {context.members(props.model)}
         </>
     );