♻️ 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
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✅ 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/priority-queue.d.ts

@@ -1,13 +0,0 @@
-import { type Queue, type RunFunction } from './queue.js';
-import { type QueueAddOptions } from './options.js';
-export type PriorityQueueOptions = {
-    priority?: number;
-} & QueueAddOptions;
-export default class PriorityQueue implements Queue<RunFunction, PriorityQueueOptions> {
-    #private;
-    enqueue(run: RunFunction, options?: Partial<PriorityQueueOptions>): void;
-    setPriority(id: string, priority: number): void;
-    dequeue(): RunFunction | undefined;
-    filter(options: Readonly<Partial<PriorityQueueOptions>>): RunFunction[];
-    get size(): number;
-}