♻️ 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-turtle.js

@@ -1,54 +0,0 @@
-Prism.languages.turtle = {
-	'comment': {
-		pattern: /#.*/,
-		greedy: true
-	},
-	'multiline-string': {
-		pattern: /"""(?:(?:""?)?(?:[^"\\]|\\.))*"""|'''(?:(?:''?)?(?:[^'\\]|\\.))*'''/,
-		greedy: true,
-		alias: 'string',
-		inside: {
-			'comment': /#.*/
-		}
-	},
-	'string': {
-		pattern: /"(?:[^\\"\r\n]|\\.)*"|'(?:[^\\'\r\n]|\\.)*'/,
-		greedy: true
-	},
-	'url': {
-		pattern: /<(?:[^\x00-\x20<>"{}|^`\\]|\\(?:u[\da-fA-F]{4}|U[\da-fA-F]{8}))*>/,
-		greedy: true,
-		inside: {
-			'punctuation': /[<>]/
-		}
-	},
-	'function': {
-		pattern: /(?:(?![-.\d\xB7])[-.\w\xB7\xC0-\uFFFD]+)?:(?:(?![-.])(?:[-.:\w\xC0-\uFFFD]|%[\da-f]{2}|\\.)+)?/i,
-		inside: {
-			'local-name': {
-				pattern: /([^:]*:)[\s\S]+/,
-				lookbehind: true
-			},
-			'prefix': {
-				pattern: /[\s\S]+/,
-				inside: {
-					'punctuation': /:/
-				}
-			}
-		}
-	},
-	'number': /[+-]?\b\d+(?:\.\d*)?(?:e[+-]?\d+)?/i,
-	'punctuation': /[{}.,;()[\]]|\^\^/,
-	'boolean': /\b(?:false|true)\b/,
-	'keyword': [
-		/(?:\ba|@prefix|@base)\b|=/,
-		/\b(?:base|graph|prefix)\b/i
-	],
-	'tag': {
-		pattern: /@[a-z]+(?:-[a-z\d]+)*/i,
-		inside: {
-			'punctuation': /@/
-		}
-	}
-};
-Prism.languages.trig = Prism.languages['turtle'];