♻️ 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-mata.js

@@ -1,50 +0,0 @@
-// https://www.stata.com/manuals/m.pdf
-
-(function (Prism) {
-
-	var orgType = /\b(?:(?:col|row)?vector|matrix|scalar)\b/.source;
-	var type = /\bvoid\b|<org>|\b(?:complex|numeric|pointer(?:\s*\([^()]*\))?|real|string|(?:class|struct)\s+\w+|transmorphic)(?:\s*<org>)?/.source
-		.replace(/<org>/g, orgType);
-
-	Prism.languages.mata = {
-		'comment': {
-			pattern: /\/\/.*|\/\*(?:[^*/]|\*(?!\/)|\/(?!\*)|\/\*(?:[^*]|\*(?!\/))*\*\/)*\*\//,
-			greedy: true
-		},
-		'string': {
-			pattern: /"[^"\r\n]*"|[‘`']".*?"[’`']/,
-			greedy: true
-		},
-
-		'class-name': {
-			pattern: /(\b(?:class|extends|struct)\s+)\w+(?=\s*(?:\{|\bextends\b))/,
-			lookbehind: true
-		},
-		'type': {
-			pattern: RegExp(type),
-			alias: 'class-name',
-			inside: {
-				'punctuation': /[()]/,
-				'keyword': /\b(?:class|function|struct|void)\b/
-			}
-		},
-		'keyword': /\b(?:break|class|continue|do|else|end|extends|external|final|for|function|goto|if|pragma|private|protected|public|return|static|struct|unset|unused|version|virtual|while)\b/,
-		'constant': /\bNULL\b/,
-
-		'number': {
-			pattern: /(^|[^\w.])(?:\d+(?:\.\d+)?(?:e[+-]?\d+)?|\d[a-f0-9]*(?:\.[a-f0-9]+)?x[+-]?\d+)i?(?![\w.])/i,
-			lookbehind: true
-		},
-		'missing': {
-			pattern: /(^|[^\w.])(?:\.[a-z]?)(?![\w.])/,
-			lookbehind: true,
-			alias: 'symbol'
-		},
-
-		'function': /\b[a-z_]\w*(?=\s*\()/i,
-
-		'operator': /\.\.|\+\+|--|&&|\|\||:?(?:[!=<>]=|[+\-*/^<>&|:])|[!?=\\#’`']/,
-		'punctuation': /[()[\]{},;.]/
-	};
-
-}(Prism));