[Feature]: implement react/jsx-no-useless-fragment

[fi3ework]

What problem does this feature solve?

We are migrating the storybook-rsbuild monorepo from Biome to Rslint. Almost all of our previous lint policy mapped 1:1 onto Rslint's existing rules — the one gap left on the React side is react/jsx-no-useless-fragment.

The rule is already listed (unchecked) in the eslint-plugin-react tracking issue #225, so this is a request to prioritize it. Reasons it pulls ahead of the rest of the backlog:

• It is widely deployed: eslint-config-airbnb enables it at error level (rules/react.js), and it has been ported by Biome (as noUselessFragments) and by Oxlint (react/jsx-no-useless-fragment). Migrations from either tool hit this gap immediately.
• Original rule for reference: eslint-plugin-react docs.

What does the proposed API of configuration look like?

Same as upstream eslint-plugin-react, no new API surface:

rules: {
  'react/jsx-no-useless-fragment': ['warn', { allowExpressions: true }],
}

Options to match upstream: allowExpressions (default false).