♻️ 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
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✅ 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-bbcode.js

@@ -1,29 +0,0 @@
-Prism.languages.bbcode = {
-	'tag': {
-		pattern: /\[\/?[^\s=\]]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'"\]=]+))?(?:\s+[^\s=\]]+\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'"\]=]+))*\s*\]/,
-		inside: {
-			'tag': {
-				pattern: /^\[\/?[^\s=\]]+/,
-				inside: {
-					'punctuation': /^\[\/?/
-				}
-			},
-			'attr-value': {
-				pattern: /=\s*(?:"[^"]*"|'[^']*'|[^\s'"\]=]+)/,
-				inside: {
-					'punctuation': [
-						/^=/,
-						{
-							pattern: /^(\s*)["']|["']$/,
-							lookbehind: true
-						}
-					]
-				}
-			},
-			'punctuation': /\]/,
-			'attr-name': /[^\s=\]]+/
-		}
-	}
-};
-
-Prism.languages.shortcode = Prism.languages.bbcode;