… URL parameter

Modified the `HtmlTransformHandler` type to accept a context object containing a URL and HTML content. This change supports the `html:transform:pre` hook, enhancing the handler's capability to process transformations based on the request URL.

…ilable

When `ssr.entry` (server.ts) is defined, Vite will now use it in the dev-server. This allows API and routes defined in `server.ts` to be accessible during development. This feature requires the new `@angular/ssr` APIs, which are currently in developer preview.

…Handler `utilities

Introduced the `createRequestHandler` and `createNodeRequestHandler` utilities to expose middleware functions from the `server.ts` entry point for use with Vite.
This provides flexibility in integrating different server frameworks, including Express, Hono, and Fastify, with Angular SSR.

Examples:

**Express**
```ts
export default createNodeRequestHandler(app);
```

**Nest.js**
```ts
const app = await NestFactory.create(AppModule);
export default createNodeRequestHandler(app);
```

**Hono**
```ts
const app = new Hono();
export default createRequestHandler(app.fetch);
```

**Fastify**
```ts
export default createNodeRequestHandler(async (req, res) => {
  await app.ready();
  app.server.emit('request', req, res);
});
```

Improve code structure