♻️ 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-reason.js

@@ -1,25 +0,0 @@
-Prism.languages.reason = Prism.languages.extend('clike', {
-	'string': {
-		pattern: /"(?:\\(?:\r\n|[\s\S])|[^\\\r\n"])*"/,
-		greedy: true
-	},
-	// 'class-name' must be matched *after* 'constructor' defined below
-	'class-name': /\b[A-Z]\w*/,
-	'keyword': /\b(?:and|as|assert|begin|class|constraint|do|done|downto|else|end|exception|external|for|fun|function|functor|if|in|include|inherit|initializer|lazy|let|method|module|mutable|new|nonrec|object|of|open|or|private|rec|sig|struct|switch|then|to|try|type|val|virtual|when|while|with)\b/,
-	'operator': /\.{3}|:[:=]|\|>|->|=(?:==?|>)?|<=?|>=?|[|^?'#!~`]|[+\-*\/]\.?|\b(?:asr|land|lor|lsl|lsr|lxor|mod)\b/
-});
-Prism.languages.insertBefore('reason', 'class-name', {
-	'char': {
-		pattern: /'(?:\\x[\da-f]{2}|\\o[0-3][0-7][0-7]|\\\d{3}|\\.|[^'\\\r\n])'/,
-		greedy: true
-	},
-	// Negative look-ahead prevents from matching things like String.capitalize
-	'constructor': /\b[A-Z]\w*\b(?!\s*\.)/,
-	'label': {
-		pattern: /\b[a-z]\w*(?=::)/,
-		alias: 'symbol'
-	}
-});
-
-// We can't match functions property, so let's not even try.
-delete Prism.languages.reason.function;