♻️ 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

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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/dequal/package.json

@@ -1,57 +0,0 @@
-{
-  "name": "dequal",
-  "version": "2.0.3",
-  "repository": "lukeed/dequal",
-  "description": "A tiny (304B to 489B) utility for check for deep equality",
-  "unpkg": "dist/index.min.js",
-  "module": "dist/index.mjs",
-  "main": "dist/index.js",
-  "types": "index.d.ts",
-  "license": "MIT",
-  "author": {
-    "name": "Luke Edwards",
-    "email": "luke.edwards05@gmail.com",
-    "url": "https://lukeed.com"
-  },
-  "engines": {
-    "node": ">=6"
-  },
-  "scripts": {
-    "build": "bundt",
-    "pretest": "npm run build",
-    "postbuild": "echo \"lite\" | xargs -n1 cp -v index.d.ts",
-    "test": "uvu -r esm test"
-  },
-  "files": [
-    "*.d.ts",
-    "dist",
-    "lite"
-  ],
-  "exports": {
-    ".": {
-      "types": "./index.d.ts",
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
-    },
-    "./lite": {
-      "types": "./index.d.ts",
-      "import": "./lite/index.mjs",
-      "require": "./lite/index.js"
-    },
-    "./package.json": "./package.json"
-  },
-  "modes": {
-    "lite": "src/lite.js",
-    "default": "src/index.js"
-  },
-  "keywords": [
-    "deep",
-    "deep-equal",
-    "equality"
-  ],
-  "devDependencies": {
-    "bundt": "1.0.2",
-    "esm": "3.2.25",
-    "uvu": "0.3.2"
-  }
-}