Recognize .jsonl Extension for JSONEachRow Format

Why it matters

This feature addresses the need for seamless handling of .jsonl files, which are commonly used to store JSON objects separated by newlines. By recognizing this extension automatically, ClickHouse simplifies data import workflows and reduces configuration overhead for users dealing with newline-delimited JSON files.

How to use it

Users can now directly specify files with the .jsonl extension when importing data using the JSONEachRow format. ClickHouse will automatically interpret these files correctly without requiring manual format specification.