chore(slides): Compile all lecture slides (weeks 1-6)

Compiled HTML and PDF output for all lectures with updated examples:
- Week 1: Lectures 1-4 (Introduction, Turing Test, ELIZA, Chatbots)
- Week 2: Lectures 5-8 (Neural Networks, Activation, Backprop, Optimization)
- Week 3: Lectures 9-11 (NLP Foundations, Transformers, Attention)
- Week 4: Lectures 12-14 (LLMs, Prompting, In-Context Learning)
- Week 5: Lectures 15-17 (Fine-tuning, RLHF, Alignment)
- Week 6: Lectures 18-20 (Evaluation, Benchmarks, Applications)

Session notes updated with completion status.

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jeremymanning