Pass attributes and parameters to the handler

[vitalets]

Initial checklist

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

Problem

mdast-comment-marker parses extra parameters from the comment. It would be useful if handler receive these parameters in the Info: E.g.:

<!-- foo start bar=42 -->
Foo
<!-- foo end -->

then in the handler:

zone(tree, 'foo', function (start, nodes, end, info) {
    console.log(info.parameters); // { bar: 42 }
    // ...
})

Current solutions

Parse the comment again.

Proposed solutions

Store info parameters in the scope and then pass to the handler.