Added newest Gemini models

[CXwudi]

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

Based on Gemini's documentation, there are new models like labelled as 001, 002 as the stable models. Let's add them into Dify

2. Additional context or comments

See https://ai.google.dev/gemini-api/docs/models/gemini

3. Can you help us with this feature?

• I am interested in contributing to this feature.