feat: add initial project configuration and smoke tests

- Created pnpm workspace configuration to manage packages.
- Added a placeholder .gitkeep file in the scripts directory.
- Implemented a smoke test script to validate core API and web endpoints.
- Established TypeScript base configuration for consistent compilation settings.
- Introduced Turbo configuration for task management and build processes.

packages/api/package.json

@@ -0,0 +1,51 @@
+{
+  "name": "@davinci/api",
+  "version": "0.1.0-alpha.0",
+  "description": "Davinci Platform — NestJS API backend (Fastify adapter)",
+  "author": "Galaxis",
+  "private": true,
+  "license": "UNLICENSED",
+  "main": "dist/main.js",
+  "scripts": {
+    "build": "nest build",
+    "start": "node dist/main.js",
+    "start:dev": "nest start --watch",
+    "test": "vitest run",
+    "test:unit": "vitest run --config vitest.config.ts",
+    "test:e2e": "vitest run --config vitest.e2e.config.ts",
+    "test:cov": "vitest run --coverage",
+    "lint": "eslint \"{src,test}/**/*.ts\"",
+    "prisma:generate": "prisma generate",
+    "prisma:migrate": "prisma migrate dev"
+  },
+  "dependencies": {
+    "@davinci/shared": "workspace:*",
+    "@nestjs/common": "^11.0.0",
+    "@nestjs/config": "^4.0.0",
+    "@nestjs/core": "^11.0.0",
+    "@nestjs/platform-fastify": "^11.0.0",
+    "@nestjs/swagger": "^11.2.6",
+    "@prisma/adapter-pg": "^7.5.0",
+    "@prisma/client": "^7.0.0",
+    "@scalar/fastify-api-reference": "^1.48.5",
+    "dotenv": "^16.4.0",
+    "joi": "^17.13.0",
+    "reflect-metadata": "^0.2.0",
+    "rxjs": "^7.8.0"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^11.0.0",
+    "@nestjs/testing": "^11.0.0",
+    "@swc/core": "^1.10.0",
+    "@types/node": "^22.10.0",
+    "pino-pretty": "^13.1.3",
+    "prisma": "^7.0.0",
+    "tsx": "^4.21.0",
+    "typescript": "^5.7.0",
+    "unplugin-swc": "^1.5.0",
+    "vitest": "^3.0.0"
+  },
+  "prisma": {
+    "seed": "npx tsx prisma/seed.ts"
+  }
+}