Add GraphQL integration docs for React Native SDK

[sentry-junior]

Summary

The React Native SDK has supported graphqlIntegration() since v7.5.0, but there is no corresponding documentation page under docs.sentry.io/platforms/react-native/. The integration is undocumented for this platform, creating a gap for developers who need to capture GraphQL requests in React Native apps.

Background

• graphqlIntegration was added to sentry-react-native in v7.5.0 via PR #5299 and is listed in the official changelog.
• The underlying integration is shared from @sentry/javascript and already documented for other JS platforms (e.g. React Router has a GraphQL page).
• docs.sentry.io/platforms/react-native/integrations/graphql/ currently 404s — no page exists for this integration.

Scope

• Add a GraphQL integration docs page under platforms/react-native/ mirroring the structure of existing JS platform GraphQL pages.
• Document how to configure graphqlIntegration() in a React Native app:

import * as Sentry from '@sentry/react-native';

Sentry.init({
  integrations: [Sentry.graphqlIntegration()],
});

• Note any React Native-specific considerations (e.g. supported transports, HTTP client compatibility).

Implementation

1. Review the existing GraphQL docs page for another JS platform (e.g. React Router) as a reference.
2. Create docs/platforms/react-native/integrations/graphql.mdx (or equivalent path) with the appropriate frontmatter and content.
3. Verify the new page appears in the React Native integrations nav.

Action taken on behalf of Chris Stavitsky.

[linear-code]

DOCS-2612