Integrate SiliconFlow DeepSeek-V2-Coder Model and Update Naming Conventions in Dify

[senseb]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

1. I would like to integrate the SiliconFlow DeepSeek-V2-Coder model (link) into Dify.
   2. Additionally, I noticed that when using SiliconFlow models in Agent Mode, the function calling method is employed. However, this method is not supported by SiliconCloud models. Therefore, I opted to use the ReAct method instead.
   3. I have updated the SiliconFlow models to reflect their latest names, which are consistent with their original names on HuggingFace.

2. Additional context or comments

No response

3. Can you help us with this feature?

• I am interested in contributing to this feature.