Initial commit: Set up Garmin Health Lab project structure

- Initialize monorepo with root workspace configuration
- Set up Express.js backend with TypeScript
- Set up React 18 frontend with TypeScript
- Create database schema with SQLite
- Implement project architecture and documentation
- Add development and deployment guidelines

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

server/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "garmin-health-lab-server",
+  "version": "0.1.0",
+  "description": "Garmin Health Lab Backend",
+  "main": "dist/index.js",
+  "scripts": {
+    "dev": "tsx watch src/index.ts",
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint src --ext .ts"
+  },
+  "dependencies": {
+    "express": "^4.18.2",
+    "cors": "^2.8.5",
+    "dotenv": "^16.3.1",
+    "sqlite3": "^5.1.6",
+    "jsonwebtoken": "^9.0.2",
+    "axios": "^1.5.0",
+    "ts-node": "^10.9.1"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.17",
+    "@types/node": "^20.3.1",
+    "@types/jsonwebtoken": "^9.0.2",
+    "typescript": "^5.1.3",
+    "tsx": "^3.12.7"
+  }
+}