♻️ 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/astro/dist/runtime/client/media.prebuilt.js

@@ -1,4 +0,0 @@
-var media_prebuilt_default = `(()=>{var n=(a,t)=>{let i=async()=>{await(await a())()};if(t.value){let e=matchMedia(t.value);e.matches?i():e.addEventListener("change",i,{once:!0})}};(self.Astro||(self.Astro={})).media=n;window.dispatchEvent(new Event("astro:media"));})();`;
-export {
-  media_prebuilt_default as default
-};