♻️ 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-t4-templating.js

@@ -1,49 +0,0 @@
-(function (Prism) {
-
-	function createBlock(prefix, inside, contentAlias) {
-		return {
-			pattern: RegExp('<#' + prefix + '[\\s\\S]*?#>'),
-			alias: 'block',
-			inside: {
-				'delimiter': {
-					pattern: RegExp('^<#' + prefix + '|#>$'),
-					alias: 'important'
-				},
-				'content': {
-					pattern: /[\s\S]+/,
-					inside: inside,
-					alias: contentAlias
-				}
-			}
-		};
-	}
-
-	function createT4(insideLang) {
-		var grammar = Prism.languages[insideLang];
-		var className = 'language-' + insideLang;
-
-		return {
-			'block': {
-				pattern: /<#[\s\S]+?#>/,
-				inside: {
-					'directive': createBlock('@', {
-						'attr-value': {
-							pattern: /=(?:("|')(?:\\[\s\S]|(?!\1)[^\\])*\1|[^\s'">=]+)/,
-							inside: {
-								'punctuation': /^=|^["']|["']$/
-							}
-						},
-						'keyword': /\b\w+(?=\s)/,
-						'attr-name': /\b\w+/
-					}),
-					'expression': createBlock('=', grammar, className),
-					'class-feature': createBlock('\\+', grammar, className),
-					'standard': createBlock('', grammar, className)
-				}
-			}
-		};
-	}
-
-	Prism.languages['t4-templating'] = Object.defineProperty({}, 'createT4', { value: createT4 });
-
-}(Prism));