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/components/common/empty-table-content/empty-table-content.tsx

@@ -62,7 +62,7 @@ export const NoRecords = ({
         <Text size="small" leading="compact" weight="plus">
           {title ?? t("general.noRecordsTitle")}
         </Text>
-        <Text size="small" className="text-ui-fg-subtle">
+        <Text size="small" className="text-ui-fg-muted">
           {message ?? t("general.noRecordsMessage")}
         </Text>
       </div>