feat(core-flows): custom price flag for order line items and shipping methods (#8969)

CLOSES: CC-402

packages/modules/order/src/migrations/Migration20240902195921.ts

@@ -0,0 +1,17 @@
+import { Migration } from '@mikro-orm/migrations';
+
+export class Migration20240902195921 extends Migration {
+
+  async up(): Promise<void> {
+    this.addSql('alter table if exists "order_line_item" add column if not exists "is_custom_price" boolean not null default false;');
+
+    this.addSql('alter table if exists "order_shipping_method" add column if not exists "is_custom_amount" boolean not null default false;');
+  }
+
+  async down(): Promise<void> {
+    this.addSql('alter table if exists "order_line_item" drop column if exists "is_custom_price";');
+
+    this.addSql('alter table if exists "order_shipping_method" drop column if exists "is_custom_amount";');
+  }
+
+}