feat(tax): tax module scaffolding (#6417)

**What**
- Scaffolds the tax module

packages/order/integration-tests/utils/database.ts

@@ -7,7 +7,7 @@ const mikroOrmEntities = Models as unknown as any[]
 export const MikroOrmWrapper = TestDatabaseUtils.getMikroOrmWrapper(
   mikroOrmEntities,
   null,
-  process.env.MEDUSA_FULFILLMENT_DB_SCHEMA
+  process.env.MEDUSA_ORDER_DB_SCHEMA
 )
 
 export const DB_URL = TestDatabaseUtils.getDatabaseURL()