Add dnd.isDisabled option in the Puck component to disable drag and drop

[ProGM]

Hi there!

Here I am again with a new PR.

This adds the option to disable the drag and drop feature of the editor.

Usage:

export function Editor() {
  return (
    <Puck
       dnd={{ isDisabled: true }}
       data={{ ... }}
        /*...*/
    />
  );
}

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Name	Status	Preview	Updated (UTC)
puck-docs	✅ Ready (Inspect)	Visit Preview	Aug 12, 2024 5:05pm

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[ProGM]

Auto-bug report:
when I disable drag and drop using the attribute I've added, the side outline section starts to break with this error:

The problem is here:
https://github.com/measuredco/puck/blob/main/packages/plugin-heading-analyzer/src/HeadingAnalyzer.tsx#L167

When the drag and drop is disabled, the [${dataAttr}="${props.analyzeId}"] selector returns a broken item without the style set. Weird, it looks like the heading analyzer is strictly dependent to the drag and drop library.