Add organization name to list organization memberships (#1285)

## Description
Serialize and surface the organization name in the list organization
membership call. Addressing
#1284
## Documentation

Does this require changes to the WorkOS Docs? E.g. the [API
Reference](https://workos.com/docs/reference) or code snippets need
updates.

```
[X] No
```

If yes, link a related docs PR and add a docs maintainer as a reviewer.
Their approval is required.

Author: alisherry

src/user-management/fixtures/list-organization-memberships.json

@@ -6,6 +6,7 @@
       "id": "om_01H5JQDV7R7ATEYZDEG0W5PRYS",
       "user_id": "user_01H5JQDV7R7ATEYZDEG0W5PRYS",
       "organization_id": "organization_01H5JQDV7R7ATEYZDEG0W5PRYS",
+      "organization_name": "Example Organization",
       "status": "active",
       "created_at": "2023-07-18T02:07:19.911Z",
       "updated_at": "2023-07-18T02:07:19.911Z"

src/user-management/interfaces/organization-membership.interface.ts

@@ -6,6 +6,7 @@ export interface OrganizationMembership {
   object: 'organization_membership';
   id: string;
   organizationId: string;
+  organizationName: string;
   status: OrganizationMembershipStatus;
   userId: string;
   createdAt: string;
@@ -17,6 +18,7 @@ export interface OrganizationMembershipResponse {
   object: 'organization_membership';
   id: string;
   organization_id: string;
+  organization_name: string;
   status: OrganizationMembershipStatus;
   user_id: string;
   created_at: string;

src/user-management/serializers/organization-membership.serializer.ts

@@ -10,6 +10,7 @@ export const deserializeOrganizationMembership = (
   id: organizationMembership.id,
   userId: organizationMembership.user_id,
   organizationId: organizationMembership.organization_id,
+  organizationName: organizationMembership.organization_name,
   status: organizationMembership.status,
   createdAt: organizationMembership.created_at,
   updatedAt: organizationMembership.updated_at,

src/user-management/user-management.spec.ts

@@ -1511,6 +1511,7 @@ describe('UserManagement', () => {
           {
             object: 'organization_membership',
             organizationId: 'organization_01H5JQDV7R7ATEYZDEG0W5PRYS',
+            organizationName: 'Example Organization',
             userId: 'user_01H5JQDV7R7ATEYZDEG0W5PRYS',
             status: 'active',
           },