feat: support for Angular 18 SSR

### 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 Components are not yet compatible with Angular 18 SSR. Please add support for this angular version.

### Describe the Use Case

Angular 18 SSR for SEO and better performance

### Describe Preferred Solution

_No response_

### Describe Alternatives

_No response_

### Related Code

_No response_

### Additional Information

_No response_

The issue identifies Ionic Components and Angular 18 SSR as the scope, but names no files, tests, or entry points. First locate the existing Angular SSR compatibility path and establish a failing Angular 18 SSR case; done means Ionic Components render successfully under Angular 18 SSR.

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