message: chore: improve error messages
diff: @@ -149,7 +149,7 @@ public class DuckDBPreparedStatement implements PreparedStatement {
  @Override
  public ResultSet executeQuery() throws SQLException {
  if (!returnsResultSet) {
  - throw new SQLException("executeQuery() can only be used with SELECT queries");
  + throw new SQLException("executeQuery() can only be used with queries that return a ResultSet");
  }
  execute();
  return getResultSet();
  @@ -158,7 +158,7 @@ public class DuckDBPreparedStatement implements PreparedStatement {
  @Override
  public int executeUpdate() throws SQLException {
  if (!(returnsChangedRows || returnsNothing)) {
  - throw new SQLException("executeUpdate() cannot be used with SELECT queries");
  + throw new SQLException("executeUpdate() can only be used with queries that return nothing (eg, a DDL statement), or update rows");
  }
  execute();
  update_result = 0;
  