♻️ 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/devalue/package.json

@@ -1,37 +0,0 @@
-{
-  "name": "devalue",
-  "description": "Gets the job done when JSON.stringify can't",
-  "version": "5.6.3",
-  "repository": "sveltejs/devalue",
-  "sideEffects": false,
-  "exports": {
-    ".": {
-      "types": "./types/index.d.ts",
-      "import": "./index.js",
-      "default": "./index.js"
-    }
-  },
-  "files": [
-    "index.js",
-    "src",
-    "types"
-  ],
-  "types": "./types/index.d.ts",
-  "devDependencies": {
-    "@changesets/cli": "^2.29.6",
-    "@js-temporal/polyfill": "^0.5.1",
-    "dts-buddy": "^0.6.2",
-    "publint": "^0.3.12",
-    "typescript": "^5.9.2",
-    "uvu": "^0.5.6"
-  },
-  "license": "MIT",
-  "type": "module",
-  "packageManager": "pnpm@8.15.9",
-  "scripts": {
-    "changeset:version": "changeset version",
-    "changeset:publish": "changeset publish",
-    "build": "dts-buddy",
-    "test": "uvu"
-  }
-}