Gemini Developer API Integration to smolagents

[rahim-xelpmoc]

Gemini Developer API Usage Examples

This pull request updates the documentation for the Gemini Developer API, refining sample usage instructions for better readability and precision.
Prerequisite
To use the Gemini Developer API, export your API key as an environment variable:

export GOOGLE_API_KEY=<your_api_key>

Sample Usage

1. ToolCallingAgent

from smolagents import DuckDuckGoSearchTool, GeminiModel, ToolCallingAgent

# Initialize Gemini tool model
gemini_tool_model = GeminiModel(model_id="gemini-2.0-flash")

# Configure ToolCallingAgent with Gemini and DuckDuckGo
agent = ToolCallingAgent(
    model=gemini_tool_model,
    tools=[
        DuckDuckGoSearchTool(),
    ],
)

# Execute a query
agent.run("What is the price of the latest iPhone in India?")

2. CodeAgent

from smolagents import DuckDuckGoSearchTool, GeminiModel, CodeAgent

# Initialize Gemini model for CodeAgent
gemini_model = GeminiModel(is_code_agent=True)

# Configure CodeAgent with Gemini and DuckDuckGo
agent = CodeAgent(
    model=gemini_model,
    tools=[
        DuckDuckGoSearchTool(),
    ],
)

# Execute a query
agent.run("What is the price of the latest iPhone in India?")