Update README.md

Update README and app.py: change title to 'Web Search MCP', enhance rate limit to 360 requests/hour, and improve logging for rate limit and content extraction.

Enhance README and app.py: clarify search functionality, add search type options, and improve usage examples for web search capabilities.

Update README and app.py for Web Search MCP Server: enhance documentation, improve usage instructions, and implement main content extraction with error handling.

Add Gradio web search application and update README with usage instructions

initial commit