Outdated README, Unclear directory structure, No contribution guidelines

[navyajain7105]

Key Issues Found

1. Outdated README - Only mentions ML4SCI, doesn't reflect the full scope
2. Inconsistent branding - References to ML4SCI, HSF, and HumanAI mixed throughout
3. No development documentation - Missing setup, build, and contribution instructions
4. Unclear directory structure - Mix of prefixed collections (_gsoc*, _gsdocs*, etc.) without explanation
5. No contribution guidelines - Users don't know how to contribute
6. Limited comments - Complex Jekyll configuration lacks documentation

Files Added:

• ✅ Updated README.md - Comprehensive guide
• ✅ Created CONTRIBUTING.md - Contribution guidelines
• ✅ Created STRUCTURE.md - Directory structure guide

[Srishti-1806]

Impressive !!!