docs: Final documentation polish and consistency fixes

- Update README.md with LLM assistant section
- Create optimization_memory JSONL structure
- Move implementation plans from skills/modules to docs/plans
- Verify all imports work correctly

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

knowledge_base/lac/optimization_memory/beam.jsonl

@@ -0,0 +1 @@
+{"geometry_type": "beam", "study_name": "example", "method": "TPE", "objectives": ["mass"], "trials": 0, "converged": false, "notes": "Schema file - replace with real data"}