chore(dashboard): Cleanup Pricing domain (#7035)

**What**
- Adds missing translations
- Minor cleanup

**Note**
- The domain is still missing features that are supported in V1, but are currently not available in V2. The types are also all wrong, so will need to revisit after the pricing domain is revisited, types have been added, and missing features implemented.

CLOSES CORE-1901

packages/types/src/http/customer/admin/customer.ts

@@ -7,6 +7,9 @@ export interface CustomerGroupResponse {
   id: string
   name: string | null
   customers: CustomerResponse[]
+  metadata: Record<string, unknown> | null
+  created_at: string
+  updated_at: string
 }
 
 /**