feat: add support for multiple MCP transport types for codex

[mkXultra]

Summary

Adds transport and port configuration options to VoiceMode MCP server, enabling support for stdio, SSE, and streamable-HTTP transports with configurable ports.

Changes

Transport Configuration

• --transport option: Choose between stdio (default), sse, or streamable-http transports
• --port option: Configure port for HTTP-based transports (default: 8000)
• Smart port handling: Port option only applies to HTTP transports, ignored for stdio
• FastMCP integration: Leverages FastMCP 2.0's built-in multi-transport support

Implementation

• CLI layer: Added options to voice_mode_main_cli in cli.py
• Server layer: Updated main() function to accept transport and port parameters
• Conditional logic: Port parameter passed only for HTTP transports

Benefits

• Enables Codex and other AI coding assistants that require HTTP transports to work with VoiceMode
• Run multiple VoiceMode instances on different ports without conflicts
• Compatible with various MCP clients that require specific transports
• Enables cloud deployment with HTTP-based transports
• Facilitates integration testing with multiple server instances
• Supports browser-based debugging with HTTP transports

Testing

Tested with:

• Default stdio transport (backward compatibility)
• SSE transport on custom ports (9001, 9002)
• Streamable-HTTP transport on custom ports
• Port conflict handling
• Help text verification

Usage Examples

# Default stdio transport
voicemode

# SSE with custom port
voicemode --transport sse --port 9001

# Streamable-HTTP with custom port
voicemode --transport streamable-http --port 9002