♻️ 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-smalltalk.js

@@ -1,38 +0,0 @@
-Prism.languages.smalltalk = {
-	'comment': {
-		pattern: /"(?:""|[^"])*"/,
-		greedy: true
-	},
-	'char': {
-		pattern: /\$./,
-		greedy: true
-	},
-	'string': {
-		pattern: /'(?:''|[^'])*'/,
-		greedy: true
-	},
-	'symbol': /#[\da-z]+|#(?:-|([+\/\\*~<>=@%|&?!])\1?)|#(?=\()/i,
-	'block-arguments': {
-		pattern: /(\[\s*):[^\[|]*\|/,
-		lookbehind: true,
-		inside: {
-			'variable': /:[\da-z]+/i,
-			'punctuation': /\|/
-		}
-	},
-	'temporary-variables': {
-		pattern: /\|[^|]+\|/,
-		inside: {
-			'variable': /[\da-z]+/i,
-			'punctuation': /\|/
-		}
-	},
-	'keyword': /\b(?:new|nil|self|super)\b/,
-	'boolean': /\b(?:false|true)\b/,
-	'number': [
-		/\d+r-?[\dA-Z]+(?:\.[\dA-Z]+)?(?:e-?\d+)?/,
-		/\b\d+(?:\.\d+)?(?:e-?\d+)?/
-	],
-	'operator': /[<=]=?|:=|~[~=]|\/\/?|\\\\|>[>=]?|[!^+\-*&|,@]/,
-	'punctuation': /[.;:?\[\](){}]/
-};