Feature Request: Keep some blank lines when formatting

Describe the Feature
A configuration option (or default behavior) to keep some existing blank lines from the input file. For example, IntelliJ has the following options for Java:

Why do you want this feature?
I have some SQL files used for database migrations with a header comment at the top that isn't directly related to the first query:

-- Some header comment
-- with metadata for migrations tool

CREATE TABLE something(id INTEGER PRIMARY KEY);

When I format this with sql-formatter, it currently deletes the blank line between the header comment and the first query.

Start by reproducing the behavior with the SQL migration example in the issue and inspect the formatter's configuration and whitespace-handling entry points. The work is done when the requested blank line can be preserved through the proposed default or configuration option without breaking normal formatting behavior.