♻️ 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/deterministic-object-hash/dist/encoders.js

@@ -1,28 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-exports.encoders = void 0;
-const base_64_1 = require("base-64");
-const binary = (input) => {
-    let binary = "";
-    const bytes = new Uint8Array(input);
-    const len = bytes.byteLength;
-    for (let i = 0; i < len; i++) {
-        const buffer = bytes[i];
-        if (buffer)
-            binary += String.fromCharCode(buffer);
-    }
-    return binary;
-};
-const hex = (input) => [...new Uint8Array(input)]
-    .map((b) => b.toString(16).padStart(2, "0"))
-    .join("");
-// @see https://stackoverflow.com/questions/35155089/node-sha-256-base64-digest
-// @see https://stackoverflow.com/questions/9267899/arraybuffer-to-base64-encoded-string
-const base64 = (input) => (0, base_64_1.encode)(binary(input));
-const base64url = (input) => base64(input).replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, "");
-exports.encoders = {
-    base64,
-    base64url,
-    hex,
-    binary,
-};