♻️ 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/deterministic-object-hash/package.json

@@ -1,42 +0,0 @@
-{
-  "name": "deterministic-object-hash",
-  "version": "2.0.2",
-  "description": "A deterministic object hashing algorithm for Node.js.",
-  "main": "dist/index.js",
-  "scripts": {
-    "test": "npx jest",
-    "build": "npx tsc -b ./",
-    "ts-watch": "npx tsc -b --watch ./"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/zbauman3/Deterministic-Object-Hash.git"
-  },
-  "keywords": [
-    "deterministic",
-    "object",
-    "hash",
-    "algorithm"
-  ],
-  "author": "Zane Bauman",
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/zbauman3/Deterministic-Object-Hash/issues"
-  },
-  "homepage": "https://github.com/zbauman3/Deterministic-Object-Hash#readme",
-  "devDependencies": {
-    "@types/base-64": "^1.0.2",
-    "@types/jest": "^27.4.0",
-    "@types/lodash": "^4.14.178",
-    "@types/node": "18.18.9",
-    "jest": "^27.4.7",
-    "lodash": "^4.17.21",
-    "typescript": "^4.5.5"
-  },
-  "engines": {
-    "node": ">=18"
-  },
-  "dependencies": {
-    "base-64": "^1.0.0"
-  }
-}