feat: Integrate cohere models

[Wendong-Fan]

Description

Integrate cohere models

contributed by @NeilJohnson0930

Motivation and Context

Why is this change required? What problem does it solve? If it fixes an open issue, please link to the issue here. You can use the syntax `close https://github.com/camel-ai/camel/issues/896'

• [ ] I have raised an issue to propose this change (required for new features and bug fixes)

Types of changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds core functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation (update in the documentation)
• [ ] Example (update in the folder of example)

Implemented Tasks

• [x] Develop the script to interact with the Cohere model API.
• [x] Ensure Cohere model is seamlessly integrated within the Camel framework.
• [x] Write and execute unit tests to verify the functionality of the Cohere model integration.
• [x] Resolve compatibility issues between the Cohere application and the retriever component.

Checklist

Go over all the following points, and put an x in all the boxes that apply. If you are unsure about any of these, don't hesitate to ask. We are here to help!

• [ ] I have read the CONTRIBUTION guide. (required)
• [ ] My change requires a change to the documentation.
• [ ] I have updated the tests accordingly. (required for a bug fix or a new feature)
• [ ] I have updated the documentation accordingly.