Enable output_format_pretty_row_numbers by default for better usability

Why it matters

The feature improves usability by displaying row numbers by default in query results, making it easier for users to interpret and reference rows without manual configuration.

How to use it

This feature is enabled by default; users will automatically see row numbers in output when using formats that support output_format_pretty_row_numbers. To customize or disable, adjust the corresponding setting in the ClickHouse client or server configuration.