♻️ 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/p-queue/dist/queue.d.ts

@@ -1,8 +0,0 @@
-export type RunFunction = () => Promise<unknown>;
-export type Queue<Element, Options> = {
-    size: number;
-    filter: (options: Readonly<Partial<Options>>) => Element[];
-    dequeue: () => Element | undefined;
-    enqueue: (run: Element, options?: Partial<Options>) => void;
-    setPriority: (id: string, priority: number) => void;
-};