♻️ 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-jsstacktrace.js

@@ -1,49 +0,0 @@
-Prism.languages.jsstacktrace = {
-	'error-message': {
-		pattern: /^\S.*/m,
-		alias: 'string'
-	},
-
-	'stack-frame': {
-		pattern: /(^[ \t]+)at[ \t].*/m,
-		lookbehind: true,
-		inside: {
-			'not-my-code': {
-				pattern: /^at[ \t]+(?!\s)(?:node\.js|<unknown>|.*(?:node_modules|\(<anonymous>\)|\(<unknown>|<anonymous>$|\(internal\/|\(node\.js)).*/m,
-				alias: 'comment'
-			},
-
-			'filename': {
-				pattern: /(\bat\s+(?!\s)|\()(?:[a-zA-Z]:)?[^():]+(?=:)/,
-				lookbehind: true,
-				alias: 'url'
-			},
-
-			'function': {
-				pattern: /(\bat\s+(?:new\s+)?)(?!\s)[_$a-zA-Z\xA0-\uFFFF<][.$\w\xA0-\uFFFF<>]*/,
-				lookbehind: true,
-				inside: {
-					'punctuation': /\./
-				}
-			},
-
-			'punctuation': /[()]/,
-
-			'keyword': /\b(?:at|new)\b/,
-
-			'alias': {
-				pattern: /\[(?:as\s+)?(?!\s)[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\]/,
-				alias: 'variable'
-			},
-
-			'line-number': {
-				pattern: /:\d+(?::\d+)?\b/,
-				alias: 'number',
-				inside: {
-					'punctuation': /:/
-				}
-			},
-
-		}
-	}
-};