CodexMCP 0.1.5

Added

• Lazy loading of prompt templates to improve startup performance
• Special handling for o4-mini model with optimized parameters
• Developer notes section in README.md

Changed

• Moved prompt templates from src/codexmcp/prompts/ to src/codexmcp/prompt_files/
• Simplified JSON processing in _query_codex_via_pipe function
• Improved LLMClient to better handle different OpenAI models
• Modified package imports to avoid premature loading