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/src/prisma/__tests__/prisma.service.spec.ts

@@ -0,0 +1,33 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { PrismaService } from '../prisma.service.js';
+import { ConfigService } from '@nestjs/config';
+
+describe('PrismaService', () => {
+  let service: PrismaService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        PrismaService,
+        {
+          provide: ConfigService,
+          useValue: {
+            getOrThrow: vi.fn().mockReturnValue('postgresql://test:test@localhost:5432/test'),
+          },
+        },
+      ],
+    }).compile();
+
+    service = module.get<PrismaService>(PrismaService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+
+  it('should expose PrismaClient methods directly (extends pattern)', () => {
+    expect(typeof service.$connect).toBe('function');
+    expect(typeof service.$disconnect).toBe('function');
+  });
+});