♻️ 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-nginx.js

@@ -1,54 +0,0 @@
-(function (Prism) {
-
-	var variable = /\$(?:\w[a-z\d]*(?:_[^\x00-\x1F\s"'\\()$]*)?|\{[^}\s"'\\]+\})/i;
-
-	Prism.languages.nginx = {
-		'comment': {
-			pattern: /(^|[\s{};])#.*/,
-			lookbehind: true,
-			greedy: true
-		},
-		'directive': {
-			pattern: /(^|\s)\w(?:[^;{}"'\\\s]|\\.|"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*'|\s+(?:#.*(?!.)|(?![#\s])))*?(?=\s*[;{])/,
-			lookbehind: true,
-			greedy: true,
-			inside: {
-				'string': {
-					pattern: /((?:^|[^\\])(?:\\\\)*)(?:"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*')/,
-					lookbehind: true,
-					greedy: true,
-					inside: {
-						'escape': {
-							pattern: /\\["'\\nrt]/,
-							alias: 'entity'
-						},
-						'variable': variable
-					}
-				},
-				'comment': {
-					pattern: /(\s)#.*/,
-					lookbehind: true,
-					greedy: true
-				},
-				'keyword': {
-					pattern: /^\S+/,
-					greedy: true
-				},
-
-				// other patterns
-
-				'boolean': {
-					pattern: /(\s)(?:off|on)(?!\S)/,
-					lookbehind: true
-				},
-				'number': {
-					pattern: /(\s)\d+[a-z]*(?!\S)/i,
-					lookbehind: true
-				},
-				'variable': variable
-			}
-		},
-		'punctuation': /[{};]/
-	};
-
-}(Prism));