add: cheshire-cat configuration, tooling, tests, and documentation

Configuration:
- .env.example, .gitignore, compose.yml (main docker compose)
- docker-compose-amd.yml (ROCm), docker-compose-macos.yml
- start.sh, stop.sh convenience scripts
- LICENSE (Apache 2.0, from upstream Cheshire Cat)

Memory management utilities:
- analyze_consolidation.py, manual_consolidation.py, verify_consolidation.py
- check_memories.py, extract_declarative_facts.py, store_declarative_facts.py
- compare_systems.py (system comparison tool)
- benchmark_cat.py, streaming_benchmark.py, streaming_benchmark_v2.py

Test suite:
- quick_test.py, test_setup.py, test_setup_simple.py
- test_consolidation_direct.py, test_declarative_recall.py, test_recall.py
- test_end_to_end.py, test_full_pipeline.py
- test_phase2.py, test_phase2_comprehensive.py

Documentation:
- README.md, QUICK_START.txt, TEST_README.md, SETUP_COMPLETE.md
- PHASE2_IMPLEMENTATION_NOTES.md, PHASE2_TEST_RESULTS.md
- POST_OPTIMIZATION_ANALYSIS.md

cheshire-cat/stop.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Stop Cheshire Cat services
+
+echo "🛑 Stopping Cheshire Cat services..."
+docker-compose -f docker-compose.test.yml down
+
+echo ""
+echo "✅ Services stopped"
+echo ""
+echo "To remove all data (including uploaded knowledge):"
+echo "  docker-compose -f docker-compose.test.yml down -v"