e2e: init llamaindex e2e test (#697)

.github/workflows/test.yml

package.json

packages/core/e2e/.gitignore

packages/core/e2e/README.md

packages/core/e2e/fixtures/llm/open_ai.ts

packages/core/e2e/mock-module.js

packages/core/e2e/mock-register.js

packages/core/e2e/node/basic.e2e.ts

packages/core/e2e/package.json

packages/core/e2e/tsconfig.json

packages/core/src/agent/openai/base.ts

packages/core/src/llm/types.ts

packages/core/src/llm/utils.ts

packages/core/src/types.ts

pnpm-lock.yaml

pnpm-workspace.yaml

tsconfig.json

turbo.json