Add comprehensive contributor microagent guide

[VianneyMI]

📋 Overview

This PR adds a comprehensive microagent guide to help developers and AI Code Agents get started contributing to the Monggregate project.

🚀 What's Added

• New directory structure: .openhands/microagents/ for OpenHands microagents
• Comprehensive guide: monggregate-contributor-guide.md with detailed documentation covering:
  • Repository structure and architecture
  • Development environment setup
  • Testing guidelines and code quality standards
  • Contribution workflow and best practices
  • Implicit rules and conventions
  • Software engineering best practices for the entire development lifecycle

🎯 Purpose

This microagent serves as a comprehensive onboarding resource that:

• Helps new contributors understand the project structure and development practices
• Assists AI Code Agents in making informed contributions
• Documents implicit rules that aren't explicitly stated elsewhere
• Provides software engineering best practices for the development lifecycle
• Ensures consistency across all contributions

📚 Key Features

The microagent includes detailed sections on:

• Project Overview: Understanding Monggregate's purpose and architecture
• Development Setup: Step-by-step environment configuration
• Code Quality: Linting, formatting, and type checking standards
• Testing Strategy: Unit, integration, and end-to-end testing approaches
• Documentation Standards: MkDocs integration and docstring conventions
• Release Process: Version management and deployment procedures
• Security Guidelines: Best practices for handling sensitive data
• Performance Optimization: Strategies for efficient MongoDB operations

🔧 Technical Details

• Format: Markdown with YAML frontmatter for microagent metadata
• Location: .openhands/microagents/monggregate-contributor-guide.md
• Type: Knowledge microagent (no triggers required)
• Compatibility: Works with CodeActAgent

✅ Checklist

• Created .openhands/microagents/ directory structure
• Added comprehensive contributor guide
• Documented repository structure and architecture
• Included development setup instructions
• Covered testing and code quality standards
• Documented implicit rules and conventions
• Added software engineering best practices
• Followed microagent format specifications

🎉 Benefits

This addition will:

• Reduce onboarding time for new contributors
• Improve code quality through documented standards
• Enable better AI assistance with comprehensive context
• Ensure consistent practices across the project
• Preserve institutional knowledge in a structured format

The microagent is designed to be a living document that evolves with the project while maintaining comprehensive coverage of all aspects needed for successful contribution.

@VianneyMI can click here to continue refining the PR