v0.2.0: feat: rewrite README for maximum clarity and impact

- Lead with clear tagline: 'Find Data Fast. Build Projects Faster.'
- Feature demo GIF prominently at the top
- Problem/solution format makes purpose crystal clear
- Streamlined content focuses on core value proposition
- Show complete workflow from discovery to analysis
- Connect to syft-nsai for end-to-end data science workflow
- Remove unnecessary complexity, emphasize practical usage