🗃️ create dbml generator

Generate dbml from the Prisma schema when executing the command `bunx prisma generate`. The dbml can be used to
visualize the ERD using the dbdiagram.io website.

prisma/schema.prisma

@@ -15,7 +15,9 @@ datasource db {
   url      = env("DATABASE_URL")
 }
 
-
+generator dbml {
+  provider = "prisma-dbml-generator"
+}