feat: React Router v7 support

### Prerequisites

- [x] I have read the [Contributing Guidelines](https://github.com/ionic-team/ionic-framework/blob/main/docs/CONTRIBUTING.md#creating-an-issue).
- [x] I agree to follow the [Code of Conduct](https://ionicframework.com/code-of-conduct).
- [x] I have searched for [existing issues](https://github.com/ionic-team/ionic-framework/issues) that already include this feature request, without success.

### Describe the Feature Request

Ionic React currently uses React Router 5, which is [tagged as classic on yarn](https://classic.yarnpkg.com/en/package/react-router-dom).

[React Router](https://reactrouter.com/) v6 support will be released on the Ionic Framework v9 (no date available yet).

React Router v7 received a stable release on [November 22, 2024](https://remix.run/blog/react-router-v7).

It would be great to be able to use a version of React Router that is actively being updated and makes use of the new features in React 18 and 19.

### Describe the Use Case

React Router 7 adds optional Remix features to React Router as "framework mode". In addition, it has code-splitting features with React 18 and 19 that v5 does not.

### Describe Preferred Solution

@ionic/react-router should update to React Router 7.

### Describe Alternatives

_No response_

### Related Code

_No response_

### Additional Information

_No response_