feat(React Native) Add react native V7 migration

docs/platforms/react-native/migration/v6-to-v7.mdx

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+---
+title: Migrate from 6.x to 7.x
+sidebar_order: 99
+draft: true
+
+description: "Learn how to migrate from version 6 to version 7 of the Sentry React Native SDK"
+---
+
+The main goal of version 7 of the Sentry React Native SDK, is to bring compatibility with Sentry JavaScript version 9. This version is introducing breaking changes because of the JavaScript SDK dependency upgrade to version 9 and because we've removed deprecated APIs and restructured npm package contents.
+
+## Important Changes In Dependencies
+
+The Sentry React Native SDK ships with the Sentry JavaScript SDK as a dependency. The Sentry JavaScript SDK has been updated to version 9. This version includes a number of behavioral changes that will not be caught by type checkers, linters, or tests, so we recommend carefully reading through the entire migration guide instead of relying on automatic tooling. Please follow [the JavaScript migration guides](/platforms/javascript/guides/react/migration/v8-to-v9/) to complete the upgrade.
+
+The initial `@sentry/react-native@7.0.0` ships with `@sentry/core@9.1.0`. Always use the exact JavaScript SDK version if adding it manually to your project. Any other version might not be compatible with the React Native SDK.
+
+### General API Changes
+
+Other general JavaScript SDK version 9 changes are described in the [JavaScript SDK 8.x to 9.x migration guide](/platforms/javascript/guides/react/migration/v8-to-v9/).
+
+## Important React Native SDK `7.x` Changes
+
+This section describes API changes in the Sentry React Native SDK, version 7.
+
+### React Native Tracing Options Moved to `Sentry.init` Options
+
+TODO