feat(customer): add customer group management apis (#6233)

**What**
```
POST /admin/customer-groups
POST /admin/customer-groups/:id
GET /admin/customer-groups/:id
DELETE /admin/customer-groups/:id
```

- Workflows

packages/types/src/customer/mutations.ts

@@ -71,7 +71,7 @@ export interface CreateCustomerGroupDTO {
   created_by?: string
 }
 
-export interface CustomerGroupUpdatableFileds {
+export interface CustomerGroupUpdatableFields {
   name?: string
   metadata?: Record<string, unknown> | null
 }

packages/types/src/customer/service.ts

@@ -17,6 +17,7 @@ import {
   CreateCustomerAddressDTO,
   CreateCustomerDTO,
   CreateCustomerGroupDTO,
+  CustomerGroupUpdatableFields,
   CustomerUpdatableFields,
   UpdateCustomerAddressDTO,
 } from "./mutations"
@@ -75,17 +76,17 @@ export interface ICustomerModuleService extends IModuleService {
 
   updateCustomerGroup(
     groupId: string,
-    data: Partial<CreateCustomerGroupDTO>,
+    data: CustomerGroupUpdatableFields,
     sharedContext?: Context
   ): Promise<CustomerGroupDTO>
   updateCustomerGroup(
     groupIds: string[],
-    data: Partial<CreateCustomerGroupDTO>,
+    data: CustomerGroupUpdatableFields,
     sharedContext?: Context
   ): Promise<CustomerGroupDTO[]>
   updateCustomerGroup(
     selector: FilterableCustomerGroupProps,
-    data: Partial<CreateCustomerGroupDTO>,
+    data: CustomerGroupUpdatableFields,
     sharedContext?: Context
   ): Promise<CustomerGroupDTO[]>