enhancement: Streamline Environment Setup Process

[aygp-dr]

Multiple environment setup scripts exist with potential overlap and unclear progression:\n\n## Current Scripts\n- init.sh\n- verify-setup.sh\n- check-env.sh\n\n## Issues\n1. Redundant functionality across scripts\n2. Unclear setup progression\n3. No unified error handling\n4. Missing setup validation steps\n\n## Proposed Solution\n1. Create a single entry point script\n2. Implement modular setup phases\n3. Add comprehensive validation\n4. Improve error reporting\n5. Add setup recovery options\n\n## Success Criteria\n- Single command setup process\n- Clear error messages and recovery steps\n- Comprehensive environment validation\n- Documentation for troubleshooting\n\nThis will improve the developer experience and reduce setup-related issues.