♻️ 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/remark-smartypants/package.json

@@ -1,60 +0,0 @@
-{
-  "name": "remark-smartypants",
-  "description": "remark plugin to implement SmartyPants",
-  "version": "3.0.2",
-  "license": "MIT",
-  "files": [
-    "./dist",
-    "!dist/tsconfig.build.tsbuildinfo"
-  ],
-  "exports": "./dist/plugin.js",
-  "types": "./dist/plugin.d.ts",
-  "type": "module",
-  "engines": {
-    "node": ">=16.0.0"
-  },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/silvenon/remark-smartypants.git"
-  },
-  "author": {
-    "name": "Matija Marohnić",
-    "email": "matija.marohnic@gmail.com",
-    "url": "https://silvenon.com"
-  },
-  "homepage": "https://github.com/silvenon/remark-smartypants#readme",
-  "bugs": {
-    "url": "https://github.com/silvenon/remark-smartypants/issues",
-    "email": "matija.marohnic@gmail.com"
-  },
-  "keywords": [
-    "unified",
-    "remark",
-    "remark-plugin",
-    "smartypants",
-    "punctuation",
-    "typography",
-    "smart"
-  ],
-  "scripts": {
-    "test": "vitest run",
-    "build": "tsc --build",
-    "prepublishOnly": "npm test && npm run build"
-  },
-  "dependencies": {
-    "retext": "^9.0.0",
-    "retext-smartypants": "^6.0.0",
-    "unified": "^11.0.4",
-    "unist-util-visit": "^5.0.0"
-  },
-  "devDependencies": {
-    "@types/unist": "^3.0.2",
-    "lefthook": "^1.6.10",
-    "prettier": "^3.2.5",
-    "remark": "^15.0.1",
-    "remark-mdx": "^3.0.1",
-    "typescript": "^5.4.5",
-    "unist-util-is": "^6.0.0",
-    "vitest": "^1.5.0"
-  }
-}