feat: Enable async execution for research and analysis tasks to support parallel processing

feat: Enhance OpenAI API key handling and load environment variables from multiple locations

feat: Update task configurations to enforce memory saving and report structure requirements

feat: Enhance settings configuration with output directory and report quality parameters

Add task configuration for Researcher, Analyst, Reporter, and Manager agents

Add settings module for application configuration and management

Add configuration module for FinResearch AI

Add agent configuration for Manager, Researcher, Analyst, and Reporter roles