♻️ 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/assets/vite-plugin-assets.d.ts

@@ -1,12 +0,0 @@
-import type * as fsMod from 'node:fs';
-import type * as vite from 'vite';
-import type { Logger } from '../core/logger/core.js';
-import type { AstroSettings } from '../types/astro.js';
-interface Options {
-    settings: AstroSettings;
-    sync: boolean;
-    logger: Logger;
-    fs: typeof fsMod;
-}
-export default function assets({ fs, settings, sync, logger }: Options): vite.Plugin[];
-export {};