chore(lib): add prisma client initialization

src/lib/prisma.ts

@@ -0,0 +1,11 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+const globalForPrisma = global as unknown as { prisma: typeof prisma };
+
+if (process.env.NODE_ENV !== 'production') {
+  globalForPrisma.prisma = prisma;
+}
+
+export default prisma;