Dark mode support opt-out

[nwazuo]

Hi, thanks for this great package.
We use the Markdown components for our UI kit in our organization which is shared between projects.

We recently bumped up this package from v3.4.0 to v3.14.4. in our UI kit and the dark mode support breaks(dark bgs for some users) our components which use the Markdown component.

Is there a way to opt out of this dark mode support? Perhaps with a config?

I'm aware of the ways of forcing either light or dark mode (by setting the data-color-mode attribute) but they aren't practical for our use case because our components all encapsulate their styles and setting the attribute for all our apps may break future dark mode support and require code changes across a lot of files.

Thank you.

[jaywcjlove]

https://github.com/uiwjs/react-markdown-preview/blob/bc68750401b8c638c6ab21f34ab5ef83ae228ef7/src/index.tsx#L27-L29

@nwazuo example: https://codesandbox.io/embed/react-markdown-preview-uiwjs-react-md-editor-issues-448-ofdjl2?fontsize=14&hidenavigation=1&theme=dark

import React from "react";
import MarkdownPreview from "@uiw/react-markdown-preview";

const source = `## Markdown Preview

 > todo: React component preview markdown text.
`;

function Demo() {
  return (
    <>
      <MarkdownPreview
        source={source}
        warpperElement={{
+          "data-color-mode": "light"
        }}
      />
    </>
  );
}

[jaywcjlove]

@nwazuo

<div data-color-mode="light">
  <MDEditor source="Hello World!" />
</div>

[jaywcjlove]

@nwazuo Now data-color-mode can be passed as props. Upgrade v3.19.3

<MDEditor
+  data-color-mode="light"
  height={200}
  value={value}
  onChange={setValue}
/>