♻️ 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/literal/treegridRole.js

@@ -1,22 +0,0 @@
-"use strict";
-
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-exports.default = void 0;
-var treegridRole = {
-  abstract: false,
-  accessibleNameRequired: true,
-  baseConcepts: [],
-  childrenPresentational: false,
-  nameFrom: ['author'],
-  prohibitedProps: [],
-  props: {},
-  relatedConcepts: [],
-  requireContextRole: [],
-  requiredContextRole: [],
-  requiredOwnedElements: [['row'], ['row', 'rowgroup']],
-  requiredProps: {},
-  superClass: [['roletype', 'widget', 'composite', 'grid'], ['roletype', 'structure', 'section', 'table', 'grid'], ['roletype', 'widget', 'composite', 'select', 'tree'], ['roletype', 'structure', 'section', 'group', 'select', 'tree']]
-};
-var _default = exports.default = treegridRole;