♻️ 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-apl.js

@@ -1,32 +0,0 @@
-Prism.languages.apl = {
-	'comment': /(?:⍝|#[! ]).*$/m,
-	'string': {
-		pattern: /'(?:[^'\r\n]|'')*'/,
-		greedy: true
-	},
-	'number': /¯?(?:\d*\.?\b\d+(?:e[+¯]?\d+)?|¯|∞)(?:j¯?(?:(?:\d+(?:\.\d+)?|\.\d+)(?:e[+¯]?\d+)?|¯|∞))?/i,
-	'statement': /:[A-Z][a-z][A-Za-z]*\b/,
-	'system-function': {
-		pattern: /⎕[A-Z]+/i,
-		alias: 'function'
-	},
-	'constant': /[⍬⌾#⎕⍞]/,
-	'function': /[-+×÷⌈⌊∣|⍳⍸?*⍟○!⌹<≤=>≥≠≡≢∊⍷∪∩~∨∧⍱⍲⍴,⍪⌽⊖⍉↑↓⊂⊃⊆⊇⌷⍋⍒⊤⊥⍕⍎⊣⊢⍁⍂≈⍯↗¤→]/,
-	'monadic-operator': {
-		pattern: /[\\\/⌿⍀¨⍨⌶&∥]/,
-		alias: 'operator'
-	},
-	'dyadic-operator': {
-		pattern: /[.⍣⍠⍤∘⌸@⌺⍥]/,
-		alias: 'operator'
-	},
-	'assignment': {
-		pattern: /←/,
-		alias: 'keyword'
-	},
-	'punctuation': /[\[;\]()◇⋄]/,
-	'dfn': {
-		pattern: /[{}⍺⍵⍶⍹∇⍫:]/,
-		alias: 'builtin'
-	}
-};