API Reference: Do not document private modules (#9042)

This PR prevents documentation of private modules in the API reference

docs/api_reference/create_api_rst.py

@@ -145,8 +145,14 @@ def _load_package_modules(
     package_name = package_path.name
 
     for file_path in package_path.rglob("*.py"):
-        if not file_path.name.startswith("__"):
+        if file_path.name.startswith("_"):
+            continue
+
         relative_module_name = file_path.relative_to(package_path)
+
+        if relative_module_name.name.startswith("_"):
+            continue
+
         # Get the full namespace of the module
         namespace = str(relative_module_name).replace(".py", "").replace("/", ".")
         # Keep only the top level namespace
@@ -222,7 +228,7 @@ Classes
 """
 
             for class_ in classes:
-                if not class_['is_public']:
+                if not class_["is_public"]:
                     continue
 
                 if class_["kind"] == "TypedDict":