♻️ 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/prompts/lib/dateparts/month.js

@@ -1,33 +0,0 @@
-'use strict';
-
-const DatePart = require('./datepart');
-
-class Month extends DatePart {
-  constructor(opts={}) {
-    super(opts);
-  }
-
-  up() {
-    this.date.setMonth(this.date.getMonth() + 1);
-  }
-
-  down() {
-    this.date.setMonth(this.date.getMonth() - 1);
-  }
-
-  setTo(val) {
-    val = parseInt(val.substr(-2)) - 1;
-    this.date.setMonth(val < 0 ? 0 : val);
-  }
-
-  toString() {
-    let month = this.date.getMonth();
-    let tl = this.token.length;
-    return tl === 2 ? String(month + 1).padStart(2, '0')
-           : tl === 3 ? this.locales.monthsShort[month]
-             : tl === 4 ? this.locales.months[month]
-               : String(month + 1);
-  }
-}
-
-module.exports = Month;