♻️ 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/aria-query/lib/etc/roles/abstract/sectionheadRole.js

@@ -1,22 +0,0 @@
-"use strict";
-
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-exports.default = void 0;
-var sectionheadRole = {
-  abstract: true,
-  accessibleNameRequired: false,
-  baseConcepts: [],
-  childrenPresentational: false,
-  nameFrom: ['author', 'contents'],
-  prohibitedProps: [],
-  props: {},
-  relatedConcepts: [],
-  requireContextRole: [],
-  requiredContextRole: [],
-  requiredOwnedElements: [],
-  requiredProps: {},
-  superClass: [['roletype', 'structure']]
-};
-var _default = exports.default = sectionheadRole;