feat(dashboard,js-sdk,medusa): add ability to add outbound items to claim (#8502)

what:

- user can add/remove/update outbound items to a claim
- adds API to query variants

Note: There are several paths that are not implemented yet correctly, but have some code lying around. Those will be tackled in the followup PRs

https://github.com/user-attachments/assets/cadb3f7a-982f-44c7-8d7e-9f4f26949f4f

RESOLVES CC-330
RESOLVES CC-296

packages/core/js-sdk/src/admin/index.ts

@@ -1,4 +1,5 @@
 import { Client } from "../client"
+import { Claim } from "./claim"
 import { Currency } from "./currency"
 import { Customer } from "./customer"
 import { Fulfillment } from "./fulfillment"
@@ -16,6 +17,7 @@ import { ProductCategory } from "./product-category"
 import { ProductCollection } from "./product-collection"
 import { ProductTag } from "./product-tag"
 import { ProductType } from "./product-type"
+import { ProductVariant } from "./product-variant"
 import { Region } from "./region"
 import { Return } from "./return"
 import { ReturnReason } from "./return-reason"
@@ -28,7 +30,6 @@ import { TaxRate } from "./tax-rate"
 import { TaxRegion } from "./tax-region"
 import { Upload } from "./upload"
 import { User } from "./user"
-import { Claim } from "./claim"
 
 export class Admin {
   public invite: Invite
@@ -61,6 +62,7 @@ export class Admin {
   public user: User
   public currency: Currency
   public payment: Payment
+  public productVariant: ProductVariant
 
   constructor(client: Client) {
     this.invite = new Invite(client)
@@ -93,5 +95,6 @@ export class Admin {
     this.user = new User(client)
     this.currency = new Currency(client)
     this.payment = new Payment(client)
+    this.productVariant = new ProductVariant(client)
   }
 }

packages/core/js-sdk/src/admin/product-variant.ts

@@ -0,0 +1,23 @@
+import { HttpTypes } from "@medusajs/types"
+import { Client } from "../client"
+import { ClientHeaders } from "../types"
+
+export class ProductVariant {
+  private client: Client
+  constructor(client: Client) {
+    this.client = client
+  }
+
+  async list(
+    queryParams?: HttpTypes.AdminProductVariantParams,
+    headers?: ClientHeaders
+  ) {
+    return await this.client.fetch<HttpTypes.AdminProductVariantListResponse>(
+      `/admin/product-variants`,
+      {
+        headers,
+        query: queryParams,
+      }
+    )
+  }
+}