Add comprehensive command documentation with theoretical foundations

- Created COMMAND_DEEP_DIVE.md with in-depth explanations of each command
- Documented the theoretical foundations (Tukey, Bertin, Cleveland & McGill, etc.)
- Explained parallelization strategies and performance optimizations
- Added detailed component breakdowns for each analysis type
- Included Australian-specific intelligence features
- Linked documentation from README for easy discovery

The documentation covers:
- EDA: Statistical theory and Tukey's exploratory principles
- INT: TDQM framework and data quality dimensions
- VIS: Bertin's semiology and perceptual hierarchy
- ENG: Knowledge graphs and collective intelligence
- LLM: Information theory and cognitive load optimization
- Parallelization: Stream processing, worker threads, and Amdahl's Law

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Mrassimo

README.md

@@ -65,6 +65,8 @@ DataPilot is a comprehensive CSV analysis toolkit that provides instant insights
    - Key insights extraction
    - Analysis questions
 
+📚 **[Deep Dive: Command Theory & Implementation →](docs/COMMAND_DEEP_DIVE.md)**
+
 ## Usage Examples
 
 ```bash