Add file path to error message in make-migrations script

Author: Mr-Pepe

drift_dev/lib/src/cli/commands/make_migrations.dart

@@ -323,7 +323,7 @@ class _MigrationTestEmitter {
  } else if (schemaFile.readAsStringSync() != content) {
  cli.exit(
  "A schema for version $schemaVersion of the $dbName database already exists and differs from the current schema."
- " Either delete the existing schema file or update the schema version in the database file.");
+ " Either delete the existing schema file (${schemaFile.path}) or update the schema version in the database file.");
  }
  }