Add Settings to Skip Initial Lines in CSV/TSV Formats

Why it matters

This feature allows users to skip header lines or any initial lines in CSV or TSV files that should not be processed as data, improving flexibility in handling input files with metadata or comments.

How to use it

Set the desired number of lines to skip by configuring the input_format_csv_skip_first_lines or input_format_tsv_skip_first_lines settings before importing the file. For example, in a query, use SET input_format_csv_skip_first_lines = N where N is the number of lines to skip.