♻️ 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/http-cache-semantics/package.json

@@ -1,22 +0,0 @@
-{
-    "name": "http-cache-semantics",
-    "version": "4.2.0",
-    "description": "Parses Cache-Control and other headers. Helps building correct HTTP caches and proxies",
-    "repository": {
-        "type": "git",
-        "url": "git+https://github.com/kornelski/http-cache-semantics.git"
-    },
-    "main": "index.js",
-    "types": "index.js",
-    "scripts": {
-        "test": "mocha"
-    },
-    "files": [
-        "index.js"
-    ],
-    "author": "Kornel Lesiński <npms2@geekhood.net> (https://kornel.ski/)",
-    "license": "BSD-2-Clause",
-    "devDependencies": {
-        "mocha": "^11.0"
-    }
-}