♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/prismjs/components/prism-crystal.js

@@ -1,57 +0,0 @@
-(function (Prism) {
-	Prism.languages.crystal = Prism.languages.extend('ruby', {
-		'keyword': [
-			/\b(?:__DIR__|__END_LINE__|__FILE__|__LINE__|abstract|alias|annotation|as|asm|begin|break|case|class|def|do|else|elsif|end|ensure|enum|extend|for|fun|if|ifdef|include|instance_sizeof|lib|macro|module|next|of|out|pointerof|private|protected|ptr|require|rescue|return|select|self|sizeof|struct|super|then|type|typeof|undef|uninitialized|union|unless|until|when|while|with|yield)\b/,
-			{
-				pattern: /(\.\s*)(?:is_a|responds_to)\?/,
-				lookbehind: true
-			}
-		],
-		'number': /\b(?:0b[01_]*[01]|0o[0-7_]*[0-7]|0x[\da-fA-F_]*[\da-fA-F]|(?:\d(?:[\d_]*\d)?)(?:\.[\d_]*\d)?(?:[eE][+-]?[\d_]*\d)?)(?:_(?:[uif](?:8|16|32|64))?)?\b/,
-		'operator': [
-			/->/,
-			Prism.languages.ruby.operator,
-		],
-		'punctuation': /[(){}[\].,;\\]/,
-	});
-
-	Prism.languages.insertBefore('crystal', 'string-literal', {
-		'attribute': {
-			pattern: /@\[.*?\]/,
-			inside: {
-				'delimiter': {
-					pattern: /^@\[|\]$/,
-					alias: 'punctuation'
-				},
-				'attribute': {
-					pattern: /^(\s*)\w+/,
-					lookbehind: true,
-					alias: 'class-name'
-				},
-				'args': {
-					pattern: /\S(?:[\s\S]*\S)?/,
-					inside: Prism.languages.crystal
-				},
-			}
-		},
-		'expansion': {
-			pattern: /\{(?:\{.*?\}|%.*?%)\}/,
-			inside: {
-				'content': {
-					pattern: /^(\{.)[\s\S]+(?=.\}$)/,
-					lookbehind: true,
-					inside: Prism.languages.crystal
-				},
-				'delimiter': {
-					pattern: /^\{[\{%]|[\}%]\}$/,
-					alias: 'operator'
-				}
-			}
-		},
-		'char': {
-			pattern: /'(?:[^\\\r\n]{1,2}|\\(?:.|u(?:[A-Fa-f0-9]{1,4}|\{[A-Fa-f0-9]{1,6}\})))'/,
-			greedy: true
-		}
-	});
-
-}(Prism));