feat: add rtl option

[jerrywu001]

What kind of change does this pull request introduce?

feature: add rtl option (so easy to rtl layout)

• usage

export const RtlLayout: React.FC = () => {
  return (
    <>
      <Sandpack
        options={{
          rtl: true,
        }}
        template="react"
      />
    </>
  );
};

Checklist

• Documentation;
• Storybook (if applicable);
• Tests;
• Ready to be merged;

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[danilowoz]

It looks good to me! Can you please update your branch from main?

[jerrywu001]

to #780