feat(dashboard): Discounts details + edits (#6547)

**What**
- Discounts details page
- Edit discount details
- Edit discount configurations
- `ListSummary` component

**NOTE**
- conditions edit form will be implemented in a separate PR
- edit details from is missing metadata component which will be added later

---


https://github.com/medusajs/medusa/assets/16856471/c878af4a-48c2-4c45-b824-662784c7a139

packages/admin-next/dashboard/src/providers/router-provider/router-provider.tsx

@@ -352,9 +352,24 @@ const router = createBrowserRouter([
                 index: true,
                 lazy: () => import("../../routes/discounts/list"),
               },
+              {
+                path: "create",
+                lazy: () => import("../../routes/discounts/create"),
+              },
               {
                 path: ":id",
                 lazy: () => import("../../routes/discounts/details"),
+                children: [
+                  {
+                    path: "edit",
+                    lazy: () => import("../../routes/discounts/edit-details"),
+                  },
+                  {
+                    path: "configuration",
+                    lazy: () =>
+                      import("../../routes/discounts/edit-configuration"),
+                  },
+                ],
               },
             ],
           },