♻️ 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/rehype-parse/index.d.ts

@@ -1,24 +0,0 @@
-import type {Root} from 'hast'
-import type {Plugin} from 'unified'
-import type {Options} from './lib/index.js'
-
-export type {ErrorCode, ErrorSeverity} from 'hast-util-from-html'
-export type {Options} from './lib/index.js'
-
-/**
- * Plugin to add support for parsing from HTML.
- *
- * @this
- *   Unified processor.
- * @param
- *   Configuration (optional).
- * @returns
- *   Nothing.
- */
-declare const rehypeParse: Plugin<[(Options | null | undefined)?], string, Root>
-export default rehypeParse
-
-// Add custom settings supported when `rehype-parse` is added.
-declare module 'unified' {
-  interface Settings extends Options {}
-}