Add dictionary input support for create_model methods

[wuyuemushi]

Summary

Adds dictionary parameter support to create_model and create_models methods, enabling direct use of dictionary data alongside Pydantic models.

Why This Change?

• Increased Flexibility: Developers can now pass raw dictionaries directly without Pydantic model instantiation
• Consistency: Matches parameter patterns already used in bulk_create_models() and update_model() methods
• Backward Compatible: All existing Pydantic model usage continues to work unchanged

[wu-clan]

Reasons not to accept this type：#51 (comment)

This feature implementation is very different from bulk_create_models() and update_model() and adds more error rates.

The schema specification is still preferred, and I would consider adding it if you really need it.

[wu-clan]

We need to add docs and test cases for this.