♻️ 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-phpdoc.js

@@ -1,27 +0,0 @@
-(function (Prism) {
-
-	var typeExpression = /(?:\b[a-zA-Z]\w*|[|\\[\]])+/.source;
-
-	Prism.languages.phpdoc = Prism.languages.extend('javadoclike', {
-		'parameter': {
-			pattern: RegExp('(@(?:global|param|property(?:-read|-write)?|var)\\s+(?:' + typeExpression + '\\s+)?)\\$\\w+'),
-			lookbehind: true
-		}
-	});
-
-	Prism.languages.insertBefore('phpdoc', 'keyword', {
-		'class-name': [
-			{
-				pattern: RegExp('(@(?:global|package|param|property(?:-read|-write)?|return|subpackage|throws|var)\\s+)' + typeExpression),
-				lookbehind: true,
-				inside: {
-					'keyword': /\b(?:array|bool|boolean|callback|double|false|float|int|integer|mixed|null|object|resource|self|string|true|void)\b/,
-					'punctuation': /[|\\[\]()]/
-				}
-			}
-		],
-	});
-
-	Prism.languages.javadoclike.addSupport('php', Prism.languages.phpdoc);
-
-}(Prism));