♻️ 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/dset/package.json

@@ -1,60 +0,0 @@
-{
-  "name": "dset",
-  "version": "3.1.4",
-  "repository": "lukeed/dset",
-  "description": "A tiny (194B) utility for safely writing deep Object values~!",
-  "unpkg": "dist/index.min.js",
-  "umd:main": "dist/index.min.js",
-  "module": "dist/index.mjs",
-  "main": "dist/index.js",
-  "types": "index.d.ts",
-  "license": "MIT",
-  "exports": {
-    ".": {
-      "types": "./index.d.ts",
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
-    },
-    "./merge": {
-      "types": "./merge/index.d.ts",
-      "import": "./merge/index.mjs",
-      "require": "./merge/index.js"
-    },
-    "./package.json": "./package.json"
-  },
-  "author": {
-    "name": "Luke Edwards",
-    "email": "luke.edwards05@gmail.com",
-    "url": "https://lukeed.com"
-  },
-  "engines": {
-    "node": ">=4"
-  },
-  "scripts": {
-    "build": "bundt",
-    "test": "uvu test -r esm -i suites"
-  },
-  "files": [
-    "*.d.ts",
-    "merge",
-    "dist"
-  ],
-  "modes": {
-    "merge": "src/merge.js",
-    "default": "src/index.js"
-  },
-  "keywords": [
-    "deepset",
-    "values",
-    "object",
-    "write",
-    "deep",
-    "safe",
-    "set"
-  ],
-  "devDependencies": {
-    "bundt": "1.1.2",
-    "esm": "3.2.25",
-    "uvu": "0.5.1"
-  }
-}