feat(vite-plugin-angular): introduce support for Angular v19 HMR/live reload

[brandonroberts]

PR Checklist

Closes #1524

What is the new behavior?

When using the liveReload option in the analog plugin with Angular v19, the new HMR code generated by the compiler is handled by the vite plugin, enabling HMR updates without full page reloads.

• Inline styles and templates are supported
• External styles and templates are supported
• Page reloads occur when classes are changed (logic copied from Angular compilation)

/// <reference types="vitest" />

import { defineConfig } from 'vite';
import analog from '@analogjs/platform';

// https://vitejs.dev/config/
export default defineConfig(({ mode }) => ({
  // ..other config
  plugins: [analog({ liveReload: true })],
}));

Does this PR introduce a breaking change?

• Yes
• No

Other information

Links
https://vite.dev/guide/api-plugin.html#handlehotupdate
https://bjornlu.com/blog/hot-module-replacement-is-easy#importmetahotaccept

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