♻️ 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/prismjs/components/prism-false.js

@@ -1,32 +0,0 @@
-(function (Prism) {
-	/**
-	 * Based on the manual by Wouter van Oortmerssen.
-	 *
-	 * @see {@link https://github.com/PrismJS/prism/issues/2801#issue-829717504}
-	 */
-	Prism.languages['false'] = {
-		'comment': {
-			pattern: /\{[^}]*\}/
-		},
-		'string': {
-			pattern: /"[^"]*"/,
-			greedy: true
-		},
-		'character-code': {
-			pattern: /'(?:[^\r]|\r\n?)/,
-			alias: 'number'
-		},
-		'assembler-code': {
-			pattern: /\d+`/,
-			alias: 'important'
-		},
-		'number': /\d+/,
-		'operator': /[-!#$%&'*+,./:;=>?@\\^_`|~ßø]/,
-		'punctuation': /\[|\]/,
-		'variable': /[a-z]/,
-		'non-standard': {
-			pattern: /[()<BDO®]/,
-			alias: 'bold'
-		}
-	};
-}(Prism));