use monolith instead of singlefile

prisma/migrations/20240628014129_rename_field/migration.sql

@@ -0,0 +1,9 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `singlefile` on the `Link` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE "Link" DROP COLUMN "singlefile",
+ADD COLUMN     "monolith" TEXT;

prisma/schema.prisma

@@ -139,7 +139,7 @@ model Link {
   image         String?
   pdf           String?
   readable      String?
-  singlefile    String?
+  monolith      String?
   lastPreserved DateTime?
   importDate    DateTime?
   createdAt     DateTime   @default(now())