♻️ 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
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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/argparse/package.json

@@ -1,31 +0,0 @@
-{
-  "name": "argparse",
-  "description": "CLI arguments parser. Native port of python's argparse.",
-  "version": "2.0.1",
-  "keywords": [
-    "cli",
-    "parser",
-    "argparse",
-    "option",
-    "args"
-  ],
-  "main": "argparse.js",
-  "files": [
-    "argparse.js",
-    "lib/"
-  ],
-  "license": "Python-2.0",
-  "repository": "nodeca/argparse",
-  "scripts": {
-    "lint": "eslint .",
-    "test": "npm run lint && nyc mocha",
-    "coverage": "npm run test && nyc report --reporter html"
-  },
-  "devDependencies": {
-    "@babel/eslint-parser": "^7.11.0",
-    "@babel/plugin-syntax-class-properties": "^7.10.4",
-    "eslint": "^7.5.0",
-    "mocha": "^8.0.1",
-    "nyc": "^15.1.0"
-  }
-}