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/vitest.e2e.config.ts

@@ -0,0 +1,17 @@
+import swc from 'unplugin-swc';
+import { defineConfig } from 'vitest/config';
+import path from 'path';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    include: ['test/**/*.e2e-spec.ts', 'src/**/*.e2e-spec.ts'],
+  },
+  plugins: [swc.vite()],
+  resolve: {
+    alias: {
+      '@davinci/shared': path.resolve(__dirname, '../shared/src/index.ts'),
+    },
+  },
+});