Add web browser tool for accessing web content

[codegen-sh]

This PR adds a new web browser tool to Codegen that allows it to browse websites and extract content. This enhances Codegen's capabilities by enabling it to:

1. Access web pages and extract their content
2. Research documentation and references online
3. Gather information from websites to assist users

Implementation Details

• Added a new web_browser.py module with the browse_web function and WebBrowserObservation class
• Created a Langchain tool wrapper WebBrowserTool in the tools.py file
• Integrated the tool into the agent creation functions in agent.py
• Added the tool to the workspace tools list
• Updated the tools/init.py to export the new module

Dependencies

The implementation uses:

• requests for making HTTP requests
• BeautifulSoup for parsing HTML content

Usage Example

# Example usage in a conversation browse_web(url="https://example.com", extract_text_only=True)

This tool will be particularly useful for tasks that require accessing online resources, such as recreating websites, researching documentation, or gathering information from the web.

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