refactor(root): improve react code snippets

[lz405]

Improve react code snippets by switching to a more common solution with the react state hook instead of the react ref hook

fix #1086

Summary of the changes

Update the react code snippets and the preview component to use more common react approach

Related issue

1086

Checklist

• [ ] I have manually accessibility tested any changes, if relevant.
• [x] I have raised this pull request against the develop branch

[github-actions[bot]]

View your branch deployment here: https://mi6.github.io/ic-design-system-githubpages/branches/1086-ic-popover-menu-improve-react-code-snippets

[gd2910]

Sorry I've just approved, but on second thought, I think the variable names will be more in line with other code examples as named handlers, eg: handlePopoverOpen and handlePopoverClose