♻️ 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/content/vite-plugin-content-assets.d.ts

@@ -1,9 +0,0 @@
-import type { Plugin } from 'vite';
-import type { BuildInternals } from '../core/build/internal.js';
-import type { AstroBuildPlugin } from '../core/build/plugin.js';
-import type { StaticBuildOptions } from '../core/build/types.js';
-import type { AstroSettings } from '../types/astro.js';
-export declare function astroContentAssetPropagationPlugin({ settings, }: {
-    settings: AstroSettings;
-}): Plugin;
-export declare function astroConfigBuildPlugin(options: StaticBuildOptions, internals: BuildInternals): AstroBuildPlugin;