Add Data Analytics Agent - AI-powered data analysis with Alchemyst AI

Builders and businesses need to quickly analyze datasets without writing complex code or setting up heavy BI tools. Currently, there's no simple way to get AI-powered insights from CSV/JSON/Excel files in the awesome-saas collection.

Add a **Data Analytics Agent** that provides:
- Instant AI-powered analysis of CSV/JSON/Excel files
- Natural language Q&A about data
- Auto-generated visualizations and reports
- Professional HTML/PDF export capabilities
- No coding required - simple CLI interface

**Describe alternatives you've considered**
- Manual data analysis tools (too complex)
- Heavy BI platforms (overkill for quick insights)
- Basic CSV viewers (no AI insights)

**Technical Details:**
- Python 3.10+ with pandas, matplotlib, plotly
- CLI interface with click
- Alchemyst AI integration for insights
- Export to HTML/PDF/Markdown
- Self-contained in agents folder