feat: Add support for managing account holder in payment module (#11015)

packages/modules/payment/src/models/account-holder.ts

@@ -0,0 +1,19 @@
+import { model } from "@medusajs/framework/utils"
+
+const AccountHolder = model
+  .define("AccountHolder", {
+    id: model.id({ prefix: "acchld" }).primaryKey(),
+    provider_id: model.text(),
+    external_id: model.text(),
+    email: model.text().nullable(),
+    data: model.json().default({}),
+    metadata: model.json().nullable(),
+  })
+  .indexes([
+    {
+      on: ["provider_id", "external_id"],
+      unique: true,
+    },
+  ])
+
+export default AccountHolder