Hello, I have two small suggestions！

[popdo]

Hello, your plug-in is really great!

But I have two small suggestions:

1. 'docsify example panels' this class, I hope I can add other class names after it

It's like this

<!-- panels:start :my-class-name -->

After compiling, it looks like this

<div class="docsify-example-panels my-class-name">
    ......
</div>

2. Can it be designed to support element nesting so that complex layout can be realized? If it can be realized, it would be perfect.

<!-- div:card -->
<!--- div:card-body --->

After compiling, it looks like this:

<div class="docsify-example-panel card">
    <div class="docsify-example-item card-body">
    ......
    </div>
</div>

Thanks again!

[VagnerDomingues]

I really liked your ideas i'm trying to find some time to test them. i'll left this issued opened for now.

have you used it somewhere? i'd like to add to the documentation examples. thanks!