♻️ 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/priority-queue.js

@@ -1,39 +0,0 @@
-import lowerBound from './lower-bound.js';
-export default class PriorityQueue {
-    #queue = [];
-    enqueue(run, options) {
-        options = {
-            priority: 0,
-            ...options,
-        };
-        const element = {
-            priority: options.priority,
-            id: options.id,
-            run,
-        };
-        if (this.size === 0 || this.#queue[this.size - 1].priority >= options.priority) {
-            this.#queue.push(element);
-            return;
-        }
-        const index = lowerBound(this.#queue, element, (a, b) => b.priority - a.priority);
-        this.#queue.splice(index, 0, element);
-    }
-    setPriority(id, priority) {
-        const index = this.#queue.findIndex((element) => element.id === id);
-        if (index === -1) {
-            throw new ReferenceError(`No promise function with the id "${id}" exists in the queue.`);
-        }
-        const [item] = this.#queue.splice(index, 1);
-        this.enqueue(item.run, { priority, id });
-    }
-    dequeue() {
-        const item = this.#queue.shift();
-        return item?.run;
-    }
-    filter(options) {
-        return this.#queue.filter((element) => element.priority === options.priority).map((element) => element.run);
-    }
-    get size() {
-        return this.#queue.length;
-    }
-}