feat(db): add Prisma schema and global PrismaModule

prisma/customObjects/prisma.custom.object.ts

@@ -0,0 +1,4 @@
+import { Prisma } from '../generated/client';
+
+/** Product loaded with its versions (`include: { versions: true }`). */
+export type ProductWithVersions = Prisma.ProductGetPayload<{ include: { versions: true } }>;