♻️ 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/prerender/utils.js

@@ -1,15 +0,0 @@
-import { getOutDirWithinCwd } from "../core/build/common.js";
-function getPrerenderDefault(config) {
-  return config.output !== "server";
-}
-function getServerOutputDirectory(settings) {
-  return settings.buildOutput === "server" ? settings.config.build.server : getOutDirWithinCwd(settings.config.outDir);
-}
-function getClientOutputDirectory(settings) {
-  return settings.buildOutput === "server" ? settings.config.build.client : settings.config.outDir;
-}
-export {
-  getClientOutputDirectory,
-  getPrerenderDefault,
-  getServerOutputDirectory
-};