Suggestion: Support readonly interfaces in `getSuggestedLibFor...`

### 🔍 Search Terms

readonly target library

### ✅ Viability Checklist

- [x] This wouldn't be a breaking change in existing TypeScript/JavaScript code
- [x] This wouldn't change the runtime behavior of existing JavaScript code
- [x] This could be implemented without emitting different JS based on the types of the expressions
- [x] This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
- [x] This isn't a request to add a new utility type: https://github.com/microsoft/TypeScript/wiki/No-New-Utility-Types
- [x] This feature would agree with the rest of our Design Goals: https://github.com/Microsoft/TypeScript/wiki/TypeScript-Design-Goals

### ⭐ Suggestion

Read-only variants of ECMAScript interfaces are currently not eligible for script target suggestions. This is most noticeable with `ReadonlyArray`, since this type can arise through syntax rather than by referencing the symbol directly.

```ts
[1,2,3].toReversed();
// ~~~~~~~~~~
// Property 'toReversed' does not exist on type 'number[]'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2023' or later.

([1,2,3] as const).toReversed();
// ~~~~~~~~~~
// Property 'toReversed' does not exist on type 'readonly [1, 2, 3]'.
```

It would be useful if the suggested lib checks could resolve these in the same way.

### 📃 Motivating Example

As above.

### 💻 Use Cases

N/A

Start by tracing the existing getSuggestedLibFor... checks and their tests, then compare how mutable and readonly array expressions are resolved. Use the reported toReversed examples as the acceptance cases; done means both forms suggest the appropriate target library without changing runtime behavior.

Written by the indexing model from the issue text.