chore: add pnpm workspace configuration for apps and packages

apps/backend/prisma.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig, env } from 'prisma/config';
+import 'dotenv/config';
+
+export default defineConfig({
+  schema: 'prisma/',
+  migrations: {
+    path: 'prisma/migrations',
+    seed: 'tsx prisma/seed.ts',
+  },
+  datasource: {
+    url: env('DATABASE_URL'),
+  },
+});