Clean and organize project structure

Major reorganization:
- Created scripts/ directory for all utility scripts
- Created config/ directory for configuration files
- Moved all test files to tests/ directory
- Updated all script paths to work with new structure
- Updated README.md with new project structure diagram

New structure:
├── src/          # Source code (API + MCP)
├── scripts/      # Utility scripts (start-*.sh, docs_server.py, etc.)
├── tests/        # All test files and debug utilities
├── config/       # Configuration files (JSON, Caddy config)
├── docs/         # Documentation website
└── logs/         # Log files

All scripts updated to use relative paths from project root.
Documentation updated with new folder structure.

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

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

scripts/test.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# LangMem Test Runner Script
+
+set -e
+
+echo "🧪 Running LangMem API Tests"
+
+# Change to project root
+cd "$(dirname "$0")/.."
+
+# Check if services are running
+if ! curl -s http://localhost:8765/health > /dev/null; then
+    echo "❌ LangMem API is not running. Please start with ./scripts/start-dev.sh first."
+    exit 1
+fi
+
+# Install test dependencies
+echo "📦 Installing test dependencies..."
+pip install -r tests/requirements.txt
+
+# Run different test suites based on argument
+case "${1:-all}" in
+    "unit")
+        echo "🔬 Running unit tests..."
+        python -m pytest tests/test_api.py -v -m "not integration"
+        ;;
+    "integration")
+        echo "🔗 Running integration tests..."
+        python -m pytest tests/test_integration.py -v -m "integration"
+        ;;
+    "all")
+        echo "🎯 Running all tests..."
+        python -m pytest tests/ -v
+        ;;
+    "quick")
+        echo "⚡ Running quick tests..."
+        python -m pytest tests/ -v -m "not slow"
+        ;;
+    "coverage")
+        echo "📊 Running tests with coverage..."
+        python -m pytest tests/ -v --cov=src --cov-report=html --cov-report=term
+        ;;
+    *)
+        echo "❌ Unknown test type: $1"
+        echo "Usage: ./scripts/test.sh [unit|integration|all|quick|coverage]"
+        exit 1
+        ;;
+esac
+
+echo ""
+echo "✅ Tests completed!"
+
+# Show service logs if tests failed
+if [ $? -ne 0 ]; then
+    echo ""
+    echo "❌ Tests failed. Showing recent API logs:"
+    docker-compose logs --tail=50 langmem-api
+fi