rename MCPServerSSE to MCPServerHTTP and more docs

[samuelcolvin]

No description provided.

[hyperlint-ai]

PR Change Summary

Renamed MCPServerSSE to MCPServerHTTP and updated documentation accordingly.

• Renamed MCPServerSSE to MCPServerHTTP in the documentation.
• Updated links to reflect the new HTTP SSE transport specifications.
• Modified examples to use the new MCPServerHTTP class.

Modified Files

• docs/api/mcp.md
• docs/mcp/client.md
• docs/mcp/run-python.md
• mcp-run-python/README.md

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