feat: soft delete (#6576)

Implement soft delete on standards and custom objects.
This is a temporary solution, when we drop `pg_graphql` we should rely
on the `softDelete` functions of TypeORM.

---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>
Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>

packages/twenty-server/src/database/typeorm/metadata/migrations/1723038077987-addSoftDelete.ts

@@ -0,0 +1,17 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddSoftDelete1723038077987 implements MigrationInterface {
+  name = 'AddSoftDelete1723038077987';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."objectMetadata" ADD "isSoftDeletable" boolean`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."objectMetadata" DROP COLUMN "isSoftDeletable"`,
+    );
+  }
+}