♻️ 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
✅ Cookie consent banner included
✅ 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/prismjs/components/prism-ejs.min.js

@@ -1 +0,0 @@
-!function(a){a.languages.ejs={delimiter:{pattern:/^<%[-_=]?|[-_]?%>$/,alias:"punctuation"},comment:/^#[\s\S]*/,"language-javascript":{pattern:/[\s\S]+/,inside:a.languages.javascript}},a.hooks.add("before-tokenize",(function(e){a.languages["markup-templating"].buildPlaceholders(e,"ejs",/<%(?!%)[\s\S]+?%>/g)})),a.hooks.add("after-tokenize",(function(e){a.languages["markup-templating"].tokenizePlaceholders(e,"ejs")})),a.languages.eta=a.languages.ejs}(Prism);