♻️ 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
✅ Cookie consent banner included
✅ 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/micromark-util-decode-numeric-character-reference/index.js

@@ -1,32 +0,0 @@
-/**
- * Turn the number (in string form as either hexa- or plain decimal) coming from
- * a numeric character reference into a character.
- *
- * Sort of like `String.fromCodePoint(Number.parseInt(value, base))`, but makes
- * non-characters and control characters safe.
- *
- * @param {string} value
- *   Value to decode.
- * @param {number} base
- *   Numeric base.
- * @returns {string}
- *   Character.
- */
-export function decodeNumericCharacterReference(value, base) {
-  const code = Number.parseInt(value, base);
-  if (
-  // C0 except for HT, LF, FF, CR, space.
-  code < 9 || code === 11 || code > 13 && code < 32 ||
-  // Control character (DEL) of C0, and C1 controls.
-  code > 126 && code < 160 ||
-  // Lone high surrogates and low surrogates.
-  code > 55_295 && code < 57_344 ||
-  // Noncharacters.
-  code > 64_975 && code < 65_008 || /* eslint-disable no-bitwise */
-  (code & 65_535) === 65_535 || (code & 65_535) === 65_534 || /* eslint-enable no-bitwise */
-  // Out of range
-  code > 1_114_111) {
-    return "\uFFFD";
-  }
-  return String.fromCodePoint(code);
-}