♻️ 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-clike.js

@@ -1,31 +0,0 @@
-Prism.languages.clike = {
-	'comment': [
-		{
-			pattern: /(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,
-			lookbehind: true,
-			greedy: true
-		},
-		{
-			pattern: /(^|[^\\:])\/\/.*/,
-			lookbehind: true,
-			greedy: true
-		}
-	],
-	'string': {
-		pattern: /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
-		greedy: true
-	},
-	'class-name': {
-		pattern: /(\b(?:class|extends|implements|instanceof|interface|new|trait)\s+|\bcatch\s+\()[\w.\\]+/i,
-		lookbehind: true,
-		inside: {
-			'punctuation': /[.\\]/
-		}
-	},
-	'keyword': /\b(?:break|catch|continue|do|else|finally|for|function|if|in|instanceof|new|null|return|throw|try|while)\b/,
-	'boolean': /\b(?:false|true)\b/,
-	'function': /\b\w+(?=\()/,
-	'number': /\b0x[\da-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?/i,
-	'operator': /[<>]=?|[!=]=?=?|--?|\+\+?|&&?|\|\|?|[?*/~^%]/,
-	'punctuation': /[{}[\];(),.:]/
-};