♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

✅ 11 pages built successfully
✅ Cookie consent banner included
✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/astro/dist/i18n/vite-plugin-i18n.d.ts

@@ -1,12 +0,0 @@
-import type * as vite from 'vite';
-import type { AstroSettings } from '../types/astro.js';
-import type { AstroConfig } from '../types/public/config.js';
-type AstroInternationalization = {
-    settings: AstroSettings;
-};
-export interface I18nInternalConfig extends Pick<AstroConfig, 'base' | 'site' | 'trailingSlash'>, Pick<AstroConfig['build'], 'format'> {
-    i18n: AstroConfig['i18n'];
-    isBuild: boolean;
-}
-export default function astroInternationalization({ settings, }: AstroInternationalization): vite.Plugin;
-export {};