[Permissions] Implement getRoles (#9955)

In this PR

- introducing roles module to separate roles logic (assign a Role, get a
workspace's roles etc.) from permission logic (check if a user has a
permission)
- Introduces getRoles endpoint to fetch a workspace's roles
- introduces the first permission check: getRoles in only accessible to
users with permission on ROLE setting. Implemented
validatesUserHasWorkspaceSettingPermissionOrThrow

packages/twenty-server/src/engine/metadata-modules/role/dtos/role.dto.ts

@@ -0,0 +1,30 @@
+import { Field, HideField, ObjectType } from '@nestjs/graphql';
+
+import { Relation } from 'typeorm';
+
+import { WorkspaceMember } from 'src/engine/core-modules/user/dtos/workspace-member.dto';
+import { UserWorkspaceRoleEntity } from 'src/engine/metadata-modules/role/user-workspace-role.entity';
+
+@ObjectType()
+export class RoleDTO {
+  @Field({ nullable: false })
+  id: string;
+
+  @Field({ nullable: false })
+  label: string;
+
+  @Field({ nullable: false })
+  canUpdateAllSettings: boolean;
+
+  @Field({ nullable: true })
+  description: string;
+
+  @Field({ nullable: false })
+  isEditable: boolean;
+
+  @HideField()
+  userWorkspaceRoles: Relation<UserWorkspaceRoleEntity[]>;
+
+  @Field(() => [WorkspaceMember], { nullable: true })
+  workspaceMembers?: WorkspaceMember[];
+}