♻️ 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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✅ Ready for Easypanel deployment (no root dir needed)

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

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

@@ -1,28 +0,0 @@
-Prism.languages.go = Prism.languages.extend('clike', {
-	'string': {
-		pattern: /(^|[^\\])"(?:\\.|[^"\\\r\n])*"|`[^`]*`/,
-		lookbehind: true,
-		greedy: true
-	},
-	'keyword': /\b(?:break|case|chan|const|continue|default|defer|else|fallthrough|for|func|go(?:to)?|if|import|interface|map|package|range|return|select|struct|switch|type|var)\b/,
-	'boolean': /\b(?:_|false|iota|nil|true)\b/,
-	'number': [
-		// binary and octal integers
-		/\b0(?:b[01_]+|o[0-7_]+)i?\b/i,
-		// hexadecimal integers and floats
-		/\b0x(?:[a-f\d_]+(?:\.[a-f\d_]*)?|\.[a-f\d_]+)(?:p[+-]?\d+(?:_\d+)*)?i?(?!\w)/i,
-		// decimal integers and floats
-		/(?:\b\d[\d_]*(?:\.[\d_]*)?|\B\.\d[\d_]*)(?:e[+-]?[\d_]+)?i?(?!\w)/i
-	],
-	'operator': /[*\/%^!=]=?|\+[=+]?|-[=-]?|\|[=|]?|&(?:=|&|\^=?)?|>(?:>=?|=)?|<(?:<=?|=|-)?|:=|\.\.\./,
-	'builtin': /\b(?:append|bool|byte|cap|close|complex|complex(?:64|128)|copy|delete|error|float(?:32|64)|u?int(?:8|16|32|64)?|imag|len|make|new|panic|print(?:ln)?|real|recover|rune|string|uintptr)\b/
-});
-
-Prism.languages.insertBefore('go', 'string', {
-	'char': {
-		pattern: /'(?:\\.|[^'\\\r\n]){0,10}'/,
-		greedy: true
-	}
-});
-
-delete Prism.languages.go['class-name'];