Local search llm params

[AlonsoGuevara]

Description

initialize config with LocalSearchConfig and GlobalSearchConfig

Proposed Changes

settings.yaml: graphrag/index/init_content.py

Checklist

• [X] I have tested these changes locally.

• [X] I have reviewed the code changes.

• [X] I have added appropriate unit tests (if applicable).

  • tests.unit.config.test_default_config.TestDefaultConfig.test_create_parameters_from_env_vars