remove service context (#1618)

.changeset/tame-apples-help.md

e2e/examples/cloudflare-hono/src/index.ts

examples/astradb/query.ts

examples/mongo.ts

packages/llamaindex/src/ServiceContext.ts

packages/llamaindex/src/Settings.ts

packages/llamaindex/src/cloud/type.ts

...llamaindex/src/engines/chat/CondenseQuestionChatEngine.ts

packages/llamaindex/src/engines/query/RouterQueryEngine.ts

...es/llamaindex/src/engines/query/SubQuestionQueryEngine.ts

packages/llamaindex/src/evaluation/Correctness.ts

packages/llamaindex/src/evaluation/Faithfulness.ts

packages/llamaindex/src/evaluation/Relevancy.ts

packages/llamaindex/src/index.edge.ts

packages/llamaindex/src/indices/BaseIndex.ts

packages/llamaindex/src/indices/keyword/index.ts

packages/llamaindex/src/indices/summary/index.ts

packages/llamaindex/src/indices/vectorStore/index.ts

packages/llamaindex/src/selectors/utils.ts

packages/llamaindex/src/storage/StorageContext.ts