[permissions V2] Create and update a custom role (without granularity) (#11003)

First steps for https://github.com/twentyhq/core-team-issues/issues/595
and https://github.com/twentyhq/core-team-issues/issues/621

Not handling granular permissions through objectPermissions and
settingsPermissions next; will come next !

packages/twenty-server/src/database/typeorm/metadata/migrations/1742316060157-addIndexOnRoleLabelAndWorkspaceId.ts

@@ -0,0 +1,19 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddIndexOnRoleLabelAndWorkspaceId1742316060157
+  implements MigrationInterface
+{
+  name = 'AddIndexOnRoleLabelAndWorkspaceId1742316060157';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."role" ADD CONSTRAINT "IndexOnRoleUnique" UNIQUE ("label", "workspaceId")`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."role" DROP CONSTRAINT "IndexOnRoleUnique"`,
+    );
+  }
+}