feat: initialize project with Next.js, Prisma, and admin dashboard functionality

lib/db.ts

@@ -0,0 +1,15 @@
+import { PrismaClient } from '@prisma/client';
+import { PrismaBetterSqlite3 } from '@prisma/adapter-better-sqlite3';
+
+const globalForPrisma = global as unknown as { prisma: PrismaClient };
+
+const createPrismaClient = () => {
+  const dbUrl = process.env.DATABASE_URL || 'file:./dev.db';
+  const adapter = new PrismaBetterSqlite3({ url: dbUrl });
+  
+  return new PrismaClient({ adapter });
+};
+
+export const prisma = globalForPrisma.prisma || createPrismaClient();
+
+if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma;