Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and couldn’t find anything (or linked relevant results below)

Problem

The transformer can work on the AST without unified. It may be useful to use this as a plain function.

Solution

Move the transformer into a new package mdast-util-breaks. This package would be part of syntax-tree.

Alternatives

I chose the name to match the name remark-breaks, but it may make sense to use something more verbose, e.g.: mdast-util-break-newlines.