feat(setup): add ability to skip setup wizard and update user model

prisma/migrations/20260726170000_setup_skipped/migration.sql

@@ -0,0 +1 @@
+ALTER TABLE "User" ADD COLUMN "setupSkipped" BOOLEAN NOT NULL DEFAULT false;

prisma/schema.prisma

@@ -36,6 +36,7 @@ model User {
   passwordHash String   @db.VarChar(256)
   isAdmin      Boolean  @default(false)
   isFounder    Boolean  @default(false)
+  setupSkipped Boolean  @default(false)
   createdAt    DateTime @default(now())
   updatedAt    DateTime @updatedAt