feat(dashboard,core-flows,js-sdk,types,link-modules,payment): ability to copy payment link (#8630)

what: 

- enables a button to create a payment link when a payment delta is present
- api to delete order payment collection
- adds a pending amount to payment collections

Note: Not the happiest with the decision on when to create a payment collection and when not to. The code should programatically create or delete payment collections currently to generate the right collection for the payment delta. Adding a more specific flow to create and manage a payment collection will help reduce this burden from the code path and onto CX/merchant.

Another issue I found is that the payment collection status doesn't get updated when payment is complete as it still gets stuck to "authorized" state

https://github.com/user-attachments/assets/037a10f9-3621-43c2-94ba-1ada4b0a041b

packages/medusa/src/api/admin/payment-collections/[id]/route.ts

@@ -0,0 +1,23 @@
+import { deleteOrderPaymentCollections } from "@medusajs/core-flows"
+import { DeleteResponse } from "@medusajs/types"
+import {
+  AuthenticatedMedusaRequest,
+  MedusaResponse,
+} from "../../../../types/routing"
+
+export const DELETE = async (
+  req: AuthenticatedMedusaRequest,
+  res: MedusaResponse<DeleteResponse<"payment-collection">>
+) => {
+  const { id } = req.params
+
+  await deleteOrderPaymentCollections(req.scope).run({
+    input: { id },
+  })
+
+  res.status(200).json({
+    id,
+    object: "payment-collection",
+    deleted: true,
+  })
+}

packages/medusa/src/api/admin/payment-collections/middlewares.ts

@@ -19,4 +19,9 @@ export const adminPaymentCollectionsMiddlewares: MiddlewareRoute[] = [
       ),
     ],
   },
+  {
+    method: ["DELETE"],
+    matcher: "/admin/payment-collections/:id",
+    middlewares: [],
+  },
 ]