♻️ 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-json5.js

@@ -1,23 +0,0 @@
-(function (Prism) {
-
-	var string = /("|')(?:\\(?:\r\n?|\n|.)|(?!\1)[^\\\r\n])*\1/;
-
-	Prism.languages.json5 = Prism.languages.extend('json', {
-		'property': [
-			{
-				pattern: RegExp(string.source + '(?=\\s*:)'),
-				greedy: true
-			},
-			{
-				pattern: /(?!\s)[_$a-zA-Z\xA0-\uFFFF](?:(?!\s)[$\w\xA0-\uFFFF])*(?=\s*:)/,
-				alias: 'unquoted'
-			}
-		],
-		'string': {
-			pattern: string,
-			greedy: true
-		},
-		'number': /[+-]?\b(?:NaN|Infinity|0x[a-fA-F\d]+)\b|[+-]?(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:[eE][+-]?\d+\b)?/
-	});
-
-}(Prism));