♻️ 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/prompts/lib/dateparts/milliseconds.js

@@ -1,28 +0,0 @@
-'use strict';
-
-const DatePart = require('./datepart');
-
-class Milliseconds extends DatePart {
-  constructor(opts={}) {
-    super(opts);
-  }
-
-  up() {
-    this.date.setMilliseconds(this.date.getMilliseconds() + 1);
-  }
-
-  down() {
-    this.date.setMilliseconds(this.date.getMilliseconds() - 1);
-  }
-
-  setTo(val) {
-    this.date.setMilliseconds(parseInt(val.substr(-(this.token.length))));
-  }
-
-  toString() {
-    return String(this.date.getMilliseconds()).padStart(4, '0')
-                                              .substr(0, this.token.length);
-  }
-}
-
-module.exports = Milliseconds;