replace list index with summary index (#7478)

docs/community/integrations/chatgpt_plugins.md

docs/community/integrations/vector_stores.md

docs/core_modules/data_modules/index/composability.md

docs/core_modules/data_modules/index/document_management.md

...core_modules/data_modules/index/index_progress_bars.ipynb

docs/core_modules/model_modules/llms/usage_custom.md

docs/core_modules/query_modules/retriever/retriever_modes.md

docs/core_modules/query_modules/retriever/usage_pattern.md

docs/core_modules/query_modules/router/usage_pattern.md

docs/core_modules/supporting_modules/cost_analysis/root.md

docs/end_to_end_tutorials/chatbots/building_a_chatbot.md

docs/end_to_end_tutorials/question_and_answer.md

...torials/question_and_answer/terms_definitions_tutorial.md

...end_to_end_tutorials/question_and_answer/unified_query.md

docs/end_to_end_tutorials/usage_pattern.md

docs/examples/agent/openai_agent_retrieval.ipynb

docs/examples/callbacks/AimCallback.ipynb

docs/examples/callbacks/WandbCallbackHandler.ipynb

...examples/composable_indices/ComposableIndices-Prior.ipynb

...mples/composable_indices/ComposableIndices-Weaviate.ipynb