♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/yocto-queue/index.js

@@ -1,90 +0,0 @@
-/*
-How it works:
-`this.#head` is an instance of `Node` which keeps track of its current value and nests another instance of `Node` that keeps the value that comes after it. When a value is provided to `.enqueue()`, the code needs to iterate through `this.#head`, going deeper and deeper to find the last value. However, iterating through every single item is slow. This problem is solved by saving a reference to the last value as `this.#tail` so that it can reference it to add a new value.
-*/
-
-class Node {
-	value;
-	next;
-
-	constructor(value) {
-		this.value = value;
-	}
-}
-
-export default class Queue {
-	#head;
-	#tail;
-	#size;
-
-	constructor() {
-		this.clear();
-	}
-
-	enqueue(value) {
-		const node = new Node(value);
-
-		if (this.#head) {
-			this.#tail.next = node;
-			this.#tail = node;
-		} else {
-			this.#head = node;
-			this.#tail = node;
-		}
-
-		this.#size++;
-	}
-
-	dequeue() {
-		const current = this.#head;
-		if (!current) {
-			return;
-		}
-
-		this.#head = this.#head.next;
-		this.#size--;
-
-		// Clean up tail reference when queue becomes empty
-		if (!this.#head) {
-			this.#tail = undefined;
-		}
-
-		return current.value;
-	}
-
-	peek() {
-		if (!this.#head) {
-			return;
-		}
-
-		return this.#head.value;
-
-		// TODO: Node.js 18.
-		// return this.#head?.value;
-	}
-
-	clear() {
-		this.#head = undefined;
-		this.#tail = undefined;
-		this.#size = 0;
-	}
-
-	get size() {
-		return this.#size;
-	}
-
-	* [Symbol.iterator]() {
-		let current = this.#head;
-
-		while (current) {
-			yield current.value;
-			current = current.next;
-		}
-	}
-
-	* drain() {
-		while (this.#head) {
-			yield this.dequeue();
-		}
-	}
-}