add role assignment page (#10115)

## Context
This PR introduces the "assignment" tab in the Role edit page, currently
allowing admin users to assign workspace members to specific roles.

Note: For now, a user can only have one role and a modal will warn you
if you try to re-assign a user to a new role.

## Test
<img width="648" alt="Screenshot 2025-02-10 at 17 59 21"
src="https://github.com/user-attachments/assets/dabd7a17-6aca-4d2b-95d8-46182f53e1e8"
/>
<img width="668" alt="Screenshot 2025-02-10 at 17 59 33"
src="https://github.com/user-attachments/assets/802aab7a-db67-4f83-9a44-35773df100f7"
/>
<img width="629" alt="Screenshot 2025-02-10 at 17 59 42"
src="https://github.com/user-attachments/assets/277db061-3f05-4ccd-8a83-7a96d6c1673e"
/>

packages/twenty-server/src/engine/core-modules/user/dtos/workspace-member.dto.ts

@@ -26,6 +26,9 @@ export class WorkspaceMember {
   @Field(() => FullName)
   name: FullName;
 
+  @Field({ nullable: false })
+  userEmail: string;
+
   @Field({ nullable: false })
   colorScheme: string;
 

packages/twenty-server/src/engine/metadata-modules/permissions/utils/permissions-graphql-api-exception.filter.ts

@@ -3,6 +3,7 @@ import { Catch, ExceptionFilter } from '@nestjs/common';
 import {
   ForbiddenError,
   InternalServerError,
+  NotFoundError,
 } from 'src/engine/core-modules/graphql/utils/graphql-errors.util';
 import {
   PermissionsException,
@@ -16,6 +17,9 @@ export class PermissionsGraphqlApiExceptionFilter implements ExceptionFilter {
       case PermissionsExceptionCode.PERMISSION_DENIED:
       case PermissionsExceptionCode.CANNOT_UNASSIGN_LAST_ADMIN:
         throw new ForbiddenError(exception.message);
+      case PermissionsExceptionCode.ROLE_NOT_FOUND:
+      case PermissionsExceptionCode.USER_WORKSPACE_NOT_FOUND:
+        throw new NotFoundError(exception.message);
       default:
         throw new InternalServerError(exception.message);
     }