add llm_max_tokens to init_content.py

[zjjzyl]

Description

To ensure that the settings.yaml configuration is respected, I recommend adding the llm_max_tokens parameter to the init_content.py file. This would allow the settings.yaml to include the llm_max_tokens parameter, enabling customization of the local search as intended.

Related Issues

#570

Checklist

• [x] I have tested these changes locally.
• [ ] I have reviewed the code changes.
• [ ] I have updated the documentation (if necessary).
• [ ] I have added appropriate unit tests (if applicable).