🔧 Update main.py to change MCP server flag, add Hugging Face dependencies in pyproject.toml, and enhance LLM service with Hugging Face integration. Add new job listings and user profiles in JSON data files.

🔨 Implement core functionality for Job Search MCP Server, including user profile management, job search, cover letter generation, and Q&A response tools. Add configuration and service layers, and establish dependency management with uv. Introduce .gitignore and .python-version files for environment setup.