♻️ 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-agda.js

@@ -1,24 +0,0 @@
-(function (Prism) {
-
-	Prism.languages.agda = {
-		'comment': /\{-[\s\S]*?(?:-\}|$)|--.*/,
-		'string': {
-			pattern: /"(?:\\(?:\r\n|[\s\S])|[^\\\r\n"])*"/,
-			greedy: true,
-		},
-		'punctuation': /[(){}⦃⦄.;@]/,
-		'class-name': {
-			pattern: /((?:data|record) +)\S+/,
-			lookbehind: true,
-		},
-		'function': {
-			pattern: /(^[ \t]*)(?!\s)[^:\r\n]+(?=:)/m,
-			lookbehind: true,
-		},
-		'operator': {
-			pattern: /(^\s*|\s)(?:[=|:∀→λ\\?_]|->)(?=\s)/,
-			lookbehind: true,
-		},
-		'keyword': /\b(?:Set|abstract|constructor|data|eta-equality|field|forall|hiding|import|in|inductive|infix|infixl|infixr|instance|let|macro|module|mutual|no-eta-equality|open|overlap|pattern|postulate|primitive|private|public|quote|quoteContext|quoteGoal|quoteTerm|record|renaming|rewrite|syntax|tactic|unquote|unquoteDecl|unquoteDef|using|variable|where|with)\b/,
-	};
-}(Prism));