♻️ 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/@shikijs/vscode-textmate/package.json

@@ -1,46 +0,0 @@
-{
-  "name": "@shikijs/vscode-textmate",
-  "version": "10.0.2",
-  "type": "module",
-  "description": "Shiki's fork of `vscode-textmate`",
-  "author": {
-    "name": "Microsoft Corporation"
-  },
-  "exports": {
-    ".": "./dist/index.js"
-  },
-  "main": "./dist/index.js",
-  "types": "./dist/index.d.ts",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/shikijs/vscode-textmate"
-  },
-  "files": [
-    "dist"
-  ],
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/shikijs/vscode-textmate/issues"
-  },
-  "devDependencies": {
-    "@types/mocha": "^9.1.1",
-    "@types/node": "^16.18.121",
-    "bumpp": "^9.9.0",
-    "mocha": "^9.2.2",
-    "tsup": "^8.3.5",
-    "tsx": "^4.19.2",
-    "typescript": "^5.7.2",
-    "vscode-oniguruma": "^1.7.0"
-  },
-  "scripts": {
-    "build": "tsup",
-    "test": "mocha --ui=tdd ./src/tests/all.test.ts",
-    "benchmark": "node benchmark/benchmark.js",
-    "inspect": "tsx src/tests/inspect.ts",
-    "typecheck": "tsc --noEmit",
-    "tmconvert": "node scripts/tmconvert.js",
-    "version": "npm run compile && npm run test",
-    "postversion": "git push && git push --tags",
-    "release": "bumpp && pnpm publish"
-  }
-}