♻️ 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/cookie/package.json

@@ -1,47 +0,0 @@
-{
-  "name": "cookie",
-  "version": "1.1.1",
-  "description": "HTTP server cookie parsing and serialization",
-  "keywords": [
-    "cookie",
-    "cookies"
-  ],
-  "repository": "jshttp/cookie",
-  "funding": {
-    "type": "opencollective",
-    "url": "https://opencollective.com/express"
-  },
-  "license": "MIT",
-  "author": "Roman Shtylman <shtylman@gmail.com>",
-  "contributors": [
-    "Douglas Christopher Wilson <doug@somethingdoug.com>"
-  ],
-  "sideEffects": false,
-  "main": "dist/index.js",
-  "types": "dist/index.d.ts",
-  "files": [
-    "dist/"
-  ],
-  "scripts": {
-    "bench": "vitest bench",
-    "build": "ts-scripts build",
-    "format": "ts-scripts format",
-    "prepare": "ts-scripts install",
-    "prepublishOnly": "npm run build",
-    "specs": "ts-scripts specs",
-    "test": "ts-scripts test"
-  },
-  "devDependencies": {
-    "@borderless/ts-scripts": "^0.15.0",
-    "@vitest/coverage-v8": "^3.2.4",
-    "top-sites": "1.1.194",
-    "typescript": "^5.6.2",
-    "vitest": "^3.2.4"
-  },
-  "engines": {
-    "node": ">=18"
-  },
-  "ts-scripts": {
-    "project": "tsconfig.build.json"
-  }
-}