feat: add support for dict-type code implementations in assign_code_list_to_evo

[loadchange]

Description

Enhanced the assign_code_list_to_evo method to support both string and dictionary types for code implementations. The method now properly handles:

• String type: New implementations that are injected as factor.py
• Dictionary type: Existing implementations from knowledge base that are injected as complete file dictionaries
• Added type validation with descriptive error messages for unsupported types

Motivation and Context

The original implementation only supported string-type code, which limited the flexibility of code injection. This enhancement allows the method to work with existing implementations from the knowledge base (dict format) as well as new implementations (string format), improving the system's ability to reuse and manage code implementations.

How Has This Been Tested?

• If you are adding a new feature, test on your own test scripts.

The enhanced method now properly handles both data types while maintaining backward compatibility with existing string-based implementations.

Screenshots of Test Results (if appropriate):

1. Your own tests:
   No screenshots needed as this is a code enhancement that extends existing functionality.

Types of changes

• Fix bugs
• Add new feature
• Update documentation

---

📚 Documentation preview 📚: https://RDAgent--1222.org.readthedocs.build/en/1222/

[SunsetWolf]

Hi, @loadchange
Thank you for your interest and contribution to RD-Agent. Your contribution makes RD-Agent more generic. But there is a little problem:
If you can judge whether the key is a "factor.py" after judging it as a dict, it will avoid problems and will be more rigorous.