♻️ 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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✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/retext-stringify/package.json

@@ -1,66 +0,0 @@
-{
-  "name": "retext-stringify",
-  "version": "4.0.0",
-  "description": "retext plugin to serialize prose",
-  "license": "MIT",
-  "keywords": [
-    "concrete",
-    "cst",
-    "language",
-    "natural",
-    "plugin",
-    "process",
-    "retext",
-    "retext-plugin",
-    "stringify",
-    "syntax",
-    "serialize",
-    "text",
-    "tree",
-    "unified"
-  ],
-  "homepage": "https://github.com/retextjs/retext",
-  "repository": "https://github.com/retextjs/retext/tree/main/packages/retext-stringify",
-  "bugs": "https://github.com/retextjs/retext/issues",
-  "funding": {
-    "type": "opencollective",
-    "url": "https://opencollective.com/unified"
-  },
-  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
-  "contributors": [
-    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
-  ],
-  "sideEffects": false,
-  "type": "module",
-  "exports": "./index.js",
-  "files": [
-    "lib/",
-    "index.d.ts",
-    "index.js"
-  ],
-  "dependencies": {
-    "@types/nlcst": "^2.0.0",
-    "nlcst-to-string": "^4.0.0",
-    "unified": "^11.0.0"
-  },
-  "scripts": {},
-  "typeCoverage": {
-    "atLeast": 100,
-    "detail": true,
-    "strict": true,
-    "ignoreCatch": true
-  },
-  "xo": {
-    "overrides": [
-      {
-        "files": [
-          "**/*.ts"
-        ],
-        "rules": {
-          "@typescript-eslint/ban-types": "off"
-        }
-      }
-    ],
-    "prettier": true
-  }
-}